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<title>8 Using PyArrow from R | Apache Arrow R Cookbook</title>
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<li class="chapter" data-level="1" data-path="index.html"><a href="index.html"><i class="fa fa-check"></i><b>1</b> Preface</a>
<ul>
<li class="chapter" data-level="1.1" data-path="index.html"><a href="index.html#what-is-arrow"><i class="fa fa-check"></i><b>1.1</b> What is Arrow?</a></li>
<li class="chapter" data-level="1.2" data-path="index.html"><a href="index.html#alternative-resources"><i class="fa fa-check"></i><b>1.2</b> Alternative resources</a></li>
</ul></li>
<li class="chapter" data-level="2" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html"><i class="fa fa-check"></i><b>2</b> Reading and Writing Data - Single Files</a>
<ul>
<li class="chapter" data-level="2.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#introduction"><i class="fa fa-check"></i><b>2.1</b> Introduction</a></li>
<li class="chapter" data-level="2.2" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#convert-data-from-a-data-frame-to-an-arrow-table"><i class="fa fa-check"></i><b>2.2</b> Convert data from a data frame to an Arrow Table</a>
<ul>
<li class="chapter" data-level="2.2.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution"><i class="fa fa-check"></i><b>2.2.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="2.3" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#convert-data-from-an-arrow-table-to-a-data-frame"><i class="fa fa-check"></i><b>2.3</b> Convert data from an Arrow Table to a data frame</a>
<ul>
<li class="chapter" data-level="2.3.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-1"><i class="fa fa-check"></i><b>2.3.1</b> Solution</a></li>
<li class="chapter" data-level="2.3.2" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#discussion"><i class="fa fa-check"></i><b>2.3.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="2.4" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#write-a-parquet-file"><i class="fa fa-check"></i><b>2.4</b> Write a Parquet file</a>
<ul>
<li class="chapter" data-level="2.4.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-2"><i class="fa fa-check"></i><b>2.4.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="2.5" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#read-a-parquet-file"><i class="fa fa-check"></i><b>2.5</b> Read a Parquet file</a>
<ul>
<li class="chapter" data-level="2.5.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-3"><i class="fa fa-check"></i><b>2.5.1</b> Solution</a></li>
<li class="chapter" data-level="2.5.2" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#discussion-1"><i class="fa fa-check"></i><b>2.5.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="2.6" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#read-a-parquet-file-from-s3"><i class="fa fa-check"></i><b>2.6</b> Read a Parquet file from S3</a>
<ul>
<li class="chapter" data-level="2.6.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-4"><i class="fa fa-check"></i><b>2.6.1</b> Solution</a></li>
<li class="chapter" data-level="2.6.2" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#see-also"><i class="fa fa-check"></i><b>2.6.2</b> See also</a></li>
</ul></li>
<li class="chapter" data-level="2.7" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#filter-columns-while-reading-a-parquet-file"><i class="fa fa-check"></i><b>2.7</b> Filter columns while reading a Parquet file</a>
<ul>
<li class="chapter" data-level="2.7.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-5"><i class="fa fa-check"></i><b>2.7.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="2.8" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#write-a-feather-v2arrow-ipc-file"><i class="fa fa-check"></i><b>2.8</b> Write a Feather V2/Arrow IPC file</a>
<ul>
<li class="chapter" data-level="2.8.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-6"><i class="fa fa-check"></i><b>2.8.1</b> Solution</a></li>
<li class="chapter" data-level="2.8.2" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#discussion-2"><i class="fa fa-check"></i><b>2.8.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="2.9" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#read-a-featherarrow-ipc-file"><i class="fa fa-check"></i><b>2.9</b> Read a Feather/Arrow IPC file</a>
<ul>
<li class="chapter" data-level="2.9.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-7"><i class="fa fa-check"></i><b>2.9.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="2.10" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#write-streaming-arrow-ipc-files"><i class="fa fa-check"></i><b>2.10</b> Write streaming Arrow IPC files</a>
<ul>
<li class="chapter" data-level="2.10.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-8"><i class="fa fa-check"></i><b>2.10.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="2.11" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#read-streaming-arrow-ipc-files"><i class="fa fa-check"></i><b>2.11</b> Read streaming Arrow IPC files</a>
<ul>
<li class="chapter" data-level="2.11.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-9"><i class="fa fa-check"></i><b>2.11.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="2.12" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#write-a-csv-file"><i class="fa fa-check"></i><b>2.12</b> Write a CSV file</a>
<ul>
<li class="chapter" data-level="2.12.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-10"><i class="fa fa-check"></i><b>2.12.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="2.13" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#read-a-csv-file"><i class="fa fa-check"></i><b>2.13</b> Read a CSV file</a>
<ul>
<li class="chapter" data-level="2.13.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-11"><i class="fa fa-check"></i><b>2.13.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="2.14" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#read-a-json-file"><i class="fa fa-check"></i><b>2.14</b> Read a JSON file</a>
<ul>
<li class="chapter" data-level="2.14.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-12"><i class="fa fa-check"></i><b>2.14.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="2.15" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#write-a-compressed-single-data-file"><i class="fa fa-check"></i><b>2.15</b> Write a compressed single data file</a>
<ul>
<li class="chapter" data-level="2.15.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-13"><i class="fa fa-check"></i><b>2.15.1</b> Solution</a></li>
<li class="chapter" data-level="2.15.2" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#see-also-1"><i class="fa fa-check"></i><b>2.15.2</b> See also</a></li>
</ul></li>
<li class="chapter" data-level="2.16" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#read-compressed-data"><i class="fa fa-check"></i><b>2.16</b> Read compressed data</a>
<ul>
<li class="chapter" data-level="2.16.1" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#solution-14"><i class="fa fa-check"></i><b>2.16.1</b> Solution</a></li>
<li class="chapter" data-level="2.16.2" data-path="reading-and-writing-data---single-files.html"><a href="reading-and-writing-data---single-files.html#discussion-3"><i class="fa fa-check"></i><b>2.16.2</b> Discussion</a></li>
</ul></li>
</ul></li>
<li class="chapter" data-level="3" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html"><i class="fa fa-check"></i><b>3</b> Reading and Writing Data - Multiple Files</a>
<ul>
<li class="chapter" data-level="3.1" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#introduction-1"><i class="fa fa-check"></i><b>3.1</b> Introduction</a></li>
<li class="chapter" data-level="3.2" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#write-data-to-disk---parquet"><i class="fa fa-check"></i><b>3.2</b> Write data to disk - Parquet</a>
<ul>
<li class="chapter" data-level="3.2.1" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#solution-15"><i class="fa fa-check"></i><b>3.2.1</b> Solution</a></li>
<li class="chapter" data-level="3.2.2" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#discussion-4"><i class="fa fa-check"></i><b>3.2.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="3.3" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#write-partitioned-data---parquet"><i class="fa fa-check"></i><b>3.3</b> Write partitioned data - Parquet</a>
<ul>
<li class="chapter" data-level="3.3.1" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#solution-16"><i class="fa fa-check"></i><b>3.3.1</b> Solution</a></li>
<li class="chapter" data-level="3.3.2" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#discussion-5"><i class="fa fa-check"></i><b>3.3.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="3.4" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#read-partitioned-data"><i class="fa fa-check"></i><b>3.4</b> Read partitioned data</a>
<ul>
<li class="chapter" data-level="3.4.1" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#solution-17"><i class="fa fa-check"></i><b>3.4.1</b> Solution</a></li>
<li class="chapter" data-level="3.4.2" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#discussion-6"><i class="fa fa-check"></i><b>3.4.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="3.5" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#write-data-to-disk---featherarrow-ipc-format"><i class="fa fa-check"></i><b>3.5</b> Write data to disk - Feather/Arrow IPC format</a>
<ul>
<li class="chapter" data-level="3.5.1" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#solution-18"><i class="fa fa-check"></i><b>3.5.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="3.6" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#read-in-featherarrow-ipc-data-as-an-arrow-dataset"><i class="fa fa-check"></i><b>3.6</b> Read in Feather/Arrow IPC data as an Arrow Dataset</a>
<ul>
<li class="chapter" data-level="3.6.1" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#solution-19"><i class="fa fa-check"></i><b>3.6.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="3.7" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#write-data-to-disk---csv-format"><i class="fa fa-check"></i><b>3.7</b> Write data to disk - CSV format</a>
<ul>
<li class="chapter" data-level="3.7.1" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#solution-20"><i class="fa fa-check"></i><b>3.7.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="3.8" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#read-in-csv-data-as-an-arrow-dataset"><i class="fa fa-check"></i><b>3.8</b> Read in CSV data as an Arrow Dataset</a>
<ul>
<li class="chapter" data-level="3.8.1" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#solution-21"><i class="fa fa-check"></i><b>3.8.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="3.9" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#read-in-a-csv-dataset-no-headers"><i class="fa fa-check"></i><b>3.9</b> Read in a CSV dataset (no headers)</a>
<ul>
<li class="chapter" data-level="3.9.1" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#solution-22"><i class="fa fa-check"></i><b>3.9.1</b> Solution</a></li>
<li class="chapter" data-level="3.9.2" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#discussion-7"><i class="fa fa-check"></i><b>3.9.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="3.10" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#write-compressed-partitioned-data"><i class="fa fa-check"></i><b>3.10</b> Write compressed partitioned data</a>
<ul>
<li class="chapter" data-level="3.10.1" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#solution-23"><i class="fa fa-check"></i><b>3.10.1</b> Solution</a></li>
<li class="chapter" data-level="3.10.2" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#discussion-8"><i class="fa fa-check"></i><b>3.10.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="3.11" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#read-compressed-data-1"><i class="fa fa-check"></i><b>3.11</b> Read compressed data</a>
<ul>
<li class="chapter" data-level="3.11.1" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#solution-24"><i class="fa fa-check"></i><b>3.11.1</b> Solution</a></li>
<li class="chapter" data-level="3.11.2" data-path="reading-and-writing-data---multiple-files.html"><a href="reading-and-writing-data---multiple-files.html#discussion-9"><i class="fa fa-check"></i><b>3.11.2</b> Discussion</a></li>
</ul></li>
</ul></li>
<li class="chapter" data-level="4" data-path="creating-arrow-objects.html"><a href="creating-arrow-objects.html"><i class="fa fa-check"></i><b>4</b> Creating Arrow Objects</a>
<ul>
<li class="chapter" data-level="4.1" data-path="creating-arrow-objects.html"><a href="creating-arrow-objects.html#create-an-arrow-array-from-an-r-object"><i class="fa fa-check"></i><b>4.1</b> Create an Arrow Array from an R object</a>
<ul>
<li class="chapter" data-level="4.1.1" data-path="creating-arrow-objects.html"><a href="creating-arrow-objects.html#solution-25"><i class="fa fa-check"></i><b>4.1.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="4.2" data-path="creating-arrow-objects.html"><a href="creating-arrow-objects.html#create-a-arrow-table-from-an-r-object"><i class="fa fa-check"></i><b>4.2</b> Create a Arrow Table from an R object</a>
<ul>
<li class="chapter" data-level="4.2.1" data-path="creating-arrow-objects.html"><a href="creating-arrow-objects.html#solution-26"><i class="fa fa-check"></i><b>4.2.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="4.3" data-path="creating-arrow-objects.html"><a href="creating-arrow-objects.html#view-the-contents-of-an-arrow-table-or-recordbatch"><i class="fa fa-check"></i><b>4.3</b> View the contents of an Arrow Table or RecordBatch</a>
<ul>
<li class="chapter" data-level="4.3.1" data-path="creating-arrow-objects.html"><a href="creating-arrow-objects.html#solution-27"><i class="fa fa-check"></i><b>4.3.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="4.4" data-path="creating-arrow-objects.html"><a href="creating-arrow-objects.html#manually-create-a-recordbatch-from-an-r-object."><i class="fa fa-check"></i><b>4.4</b> Manually create a RecordBatch from an R object.</a>
<ul>
<li class="chapter" data-level="4.4.1" data-path="creating-arrow-objects.html"><a href="creating-arrow-objects.html#solution-28"><i class="fa fa-check"></i><b>4.4.1</b> Solution</a></li>
</ul></li>
</ul></li>
<li class="chapter" data-level="5" data-path="defining-data-types.html"><a href="defining-data-types.html"><i class="fa fa-check"></i><b>5</b> Defining Data Types</a>
<ul>
<li class="chapter" data-level="5.1" data-path="defining-data-types.html"><a href="defining-data-types.html#introduction-2"><i class="fa fa-check"></i><b>5.1</b> Introduction</a></li>
<li class="chapter" data-level="5.2" data-path="defining-data-types.html"><a href="defining-data-types.html#update-data-type-of-an-existing-arrow-array"><i class="fa fa-check"></i><b>5.2</b> Update data type of an existing Arrow Array</a>
<ul>
<li class="chapter" data-level="5.2.1" data-path="defining-data-types.html"><a href="defining-data-types.html#solution-29"><i class="fa fa-check"></i><b>5.2.1</b> Solution</a></li>
<li class="chapter" data-level="5.2.2" data-path="defining-data-types.html"><a href="defining-data-types.html#discussion-10"><i class="fa fa-check"></i><b>5.2.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="5.3" data-path="defining-data-types.html"><a href="defining-data-types.html#update-data-type-of-a-field-in-an-existing-arrow-table"><i class="fa fa-check"></i><b>5.3</b> Update data type of a field in an existing Arrow Table</a>
<ul>
<li class="chapter" data-level="5.3.1" data-path="defining-data-types.html"><a href="defining-data-types.html#solution-30"><i class="fa fa-check"></i><b>5.3.1</b> Solution</a></li>
<li class="chapter" data-level="5.3.2" data-path="defining-data-types.html"><a href="defining-data-types.html#no-compat-type"><i class="fa fa-check"></i><b>5.3.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="5.4" data-path="defining-data-types.html"><a href="defining-data-types.html#specify-data-types-when-creating-an-arrow-table-from-an-r-object"><i class="fa fa-check"></i><b>5.4</b> Specify data types when creating an Arrow table from an R object</a>
<ul>
<li class="chapter" data-level="5.4.1" data-path="defining-data-types.html"><a href="defining-data-types.html#solution-31"><i class="fa fa-check"></i><b>5.4.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="5.5" data-path="defining-data-types.html"><a href="defining-data-types.html#specify-data-types-when-reading-in-files"><i class="fa fa-check"></i><b>5.5</b> Specify data types when reading in files</a>
<ul>
<li class="chapter" data-level="5.5.1" data-path="defining-data-types.html"><a href="defining-data-types.html#solution-32"><i class="fa fa-check"></i><b>5.5.1</b> Solution</a></li>
</ul></li>
</ul></li>
<li class="chapter" data-level="6" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html"><i class="fa fa-check"></i><b>6</b> Manipulating Data - Arrays</a>
<ul>
<li class="chapter" data-level="6.1" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#introduction-3"><i class="fa fa-check"></i><b>6.1</b> Introduction</a></li>
<li class="chapter" data-level="6.2" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#filter-by-values-matching-a-predicate-or-mask"><i class="fa fa-check"></i><b>6.2</b> Filter by values matching a predicate or mask</a>
<ul>
<li class="chapter" data-level="6.2.1" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#solution-33"><i class="fa fa-check"></i><b>6.2.1</b> Solution</a></li>
<li class="chapter" data-level="6.2.2" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#discussion-11"><i class="fa fa-check"></i><b>6.2.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="6.3" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#compute-meanminmax-etc-value-of-an-array"><i class="fa fa-check"></i><b>6.3</b> Compute Mean/Min/Max, etc value of an Array</a>
<ul>
<li class="chapter" data-level="6.3.1" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#solution-34"><i class="fa fa-check"></i><b>6.3.1</b> Solution</a></li>
<li class="chapter" data-level="6.3.2" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#discussion-12"><i class="fa fa-check"></i><b>6.3.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="6.4" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#count-occurrences-of-elements-in-an-array"><i class="fa fa-check"></i><b>6.4</b> Count occurrences of elements in an Array</a>
<ul>
<li class="chapter" data-level="6.4.1" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#solution-35"><i class="fa fa-check"></i><b>6.4.1</b> Solution</a></li>
<li class="chapter" data-level="6.4.2" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#discussion-13"><i class="fa fa-check"></i><b>6.4.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="6.5" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#apply-arithmetic-functions-to-arrays."><i class="fa fa-check"></i><b>6.5</b> Apply arithmetic functions to Arrays.</a>
<ul>
<li class="chapter" data-level="6.5.1" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#solution-36"><i class="fa fa-check"></i><b>6.5.1</b> Solution</a></li>
<li class="chapter" data-level="6.5.2" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#discussion-14"><i class="fa fa-check"></i><b>6.5.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="6.6" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#call-arrow-compute-functions-directly-on-arrays"><i class="fa fa-check"></i><b>6.6</b> Call Arrow compute functions directly on Arrays</a>
<ul>
<li class="chapter" data-level="6.6.1" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#solution-37"><i class="fa fa-check"></i><b>6.6.1</b> Solution</a></li>
<li class="chapter" data-level="6.6.2" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#discussion-15"><i class="fa fa-check"></i><b>6.6.2</b> Discussion</a></li>
<li class="chapter" data-level="6.6.3" data-path="manipulating-data---arrays.html"><a href="manipulating-data---arrays.html#see-also-2"><i class="fa fa-check"></i><b>6.6.3</b> See also</a></li>
</ul></li>
</ul></li>
<li class="chapter" data-level="7" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html"><i class="fa fa-check"></i><b>7</b> Manipulating Data - Tables</a>
<ul>
<li class="chapter" data-level="7.1" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#introduction-4"><i class="fa fa-check"></i><b>7.1</b> Introduction</a></li>
<li class="chapter" data-level="7.2" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#use-dplyr-verbs-in-arrow"><i class="fa fa-check"></i><b>7.2</b> Use dplyr verbs in Arrow</a>
<ul>
<li class="chapter" data-level="7.2.1" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#solution-38"><i class="fa fa-check"></i><b>7.2.1</b> Solution</a></li>
<li class="chapter" data-level="7.2.2" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#discussion-16"><i class="fa fa-check"></i><b>7.2.2</b> Discussion</a></li>
<li class="chapter" data-level="7.2.3" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#see-also-3"><i class="fa fa-check"></i><b>7.2.3</b> See also</a></li>
</ul></li>
<li class="chapter" data-level="7.3" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#use-r-functions-in-dplyr-verbs-in-arrow"><i class="fa fa-check"></i><b>7.3</b> Use R functions in dplyr verbs in Arrow</a>
<ul>
<li class="chapter" data-level="7.3.1" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#solution-39"><i class="fa fa-check"></i><b>7.3.1</b> Solution</a></li>
<li class="chapter" data-level="7.3.2" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#discussion-17"><i class="fa fa-check"></i><b>7.3.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="7.4" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#use-arrow-functions-in-dplyr-verbs-in-arrow"><i class="fa fa-check"></i><b>7.4</b> Use Arrow functions in dplyr verbs in Arrow</a>
<ul>
<li class="chapter" data-level="7.4.1" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#solution-40"><i class="fa fa-check"></i><b>7.4.1</b> Solution</a></li>
<li class="chapter" data-level="7.4.2" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#discussion-18"><i class="fa fa-check"></i><b>7.4.2</b> Discussion</a></li>
</ul></li>
<li class="chapter" data-level="7.5" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#compute-window-aggregates"><i class="fa fa-check"></i><b>7.5</b> Compute Window Aggregates</a>
<ul>
<li class="chapter" data-level="7.5.1" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#solution-41"><i class="fa fa-check"></i><b>7.5.1</b> Solution</a></li>
<li class="chapter" data-level="7.5.2" data-path="manipulating-data---tables.html"><a href="manipulating-data---tables.html#discusson"><i class="fa fa-check"></i><b>7.5.2</b> Discusson</a></li>
</ul></li>
</ul></li>
<li class="chapter" data-level="8" data-path="using-pyarrow-from-r.html"><a href="using-pyarrow-from-r.html"><i class="fa fa-check"></i><b>8</b> Using PyArrow from R</a>
<ul>
<li class="chapter" data-level="8.1" data-path="using-pyarrow-from-r.html"><a href="using-pyarrow-from-r.html#introduction-5"><i class="fa fa-check"></i><b>8.1</b> Introduction</a></li>
<li class="chapter" data-level="8.2" data-path="using-pyarrow-from-r.html"><a href="using-pyarrow-from-r.html#create-an-arrow-object-using-pyarrow-in-r"><i class="fa fa-check"></i><b>8.2</b> Create an Arrow object using PyArrow in R</a>
<ul>
<li class="chapter" data-level="8.2.1" data-path="using-pyarrow-from-r.html"><a href="using-pyarrow-from-r.html#solution-42"><i class="fa fa-check"></i><b>8.2.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="8.3" data-path="using-pyarrow-from-r.html"><a href="using-pyarrow-from-r.html#call-a-pyarrow-function-from-r"><i class="fa fa-check"></i><b>8.3</b> Call a PyArrow function from R</a>
<ul>
<li class="chapter" data-level="8.3.1" data-path="using-pyarrow-from-r.html"><a href="using-pyarrow-from-r.html#solution-43"><i class="fa fa-check"></i><b>8.3.1</b> Solution</a></li>
</ul></li>
</ul></li>
<li class="chapter" data-level="9" data-path="flight.html"><a href="flight.html"><i class="fa fa-check"></i><b>9</b> Flight</a>
<ul>
<li class="chapter" data-level="9.1" data-path="flight.html"><a href="flight.html#introduction-6"><i class="fa fa-check"></i><b>9.1</b> Introduction</a></li>
<li class="chapter" data-level="9.2" data-path="flight.html"><a href="flight.html#connect-to-a-flight-server"><i class="fa fa-check"></i><b>9.2</b> Connect to a Flight server</a>
<ul>
<li class="chapter" data-level="9.2.1" data-path="flight.html"><a href="flight.html#solution-44"><i class="fa fa-check"></i><b>9.2.1</b> Solution</a></li>
<li class="chapter" data-level="9.2.2" data-path="flight.html"><a href="flight.html#see-also-4"><i class="fa fa-check"></i><b>9.2.2</b> See also</a></li>
</ul></li>
<li class="chapter" data-level="9.3" data-path="flight.html"><a href="flight.html#send-data-to-a-flight-server"><i class="fa fa-check"></i><b>9.3</b> Send data to a Flight server</a>
<ul>
<li class="chapter" data-level="9.3.1" data-path="flight.html"><a href="flight.html#solution-45"><i class="fa fa-check"></i><b>9.3.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="9.4" data-path="flight.html"><a href="flight.html#check-what-resources-exist-on-a-flight-server"><i class="fa fa-check"></i><b>9.4</b> Check what resources exist on a Flight server</a>
<ul>
<li class="chapter" data-level="9.4.1" data-path="flight.html"><a href="flight.html#solution-46"><i class="fa fa-check"></i><b>9.4.1</b> Solution</a></li>
</ul></li>
<li class="chapter" data-level="9.5" data-path="flight.html"><a href="flight.html#retrieve-data-from-a-flight-server"><i class="fa fa-check"></i><b>9.5</b> Retrieve data from a Flight server</a>
<ul>
<li class="chapter" data-level="9.5.1" data-path="flight.html"><a href="flight.html#solution-47"><i class="fa fa-check"></i><b>9.5.1</b> Solution</a></li>
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<div id="using-pyarrow-from-r" class="section level1 hasAnchor" number="8">
<h1><span class="header-section-number">8</span> Using PyArrow from R<a href="using-pyarrow-from-r.html#using-pyarrow-from-r" class="anchor-section" aria-label="Anchor link to header"></a></h1>
<div id="introduction-5" class="section level2 hasAnchor" number="8.1">
<h2><span class="header-section-number">8.1</span> Introduction<a href="using-pyarrow-from-r.html#introduction-5" class="anchor-section" aria-label="Anchor link to header"></a></h2>
<p>For more information on using setting up and installing PyArrow to use in R, see
<a href="https://arrow.apache.org/docs/r/articles/python.html">the “Apache Arrow in Python and R with reticulate” vignette</a>.</p>
</div>
<div id="create-an-arrow-object-using-pyarrow-in-r" class="section level2 hasAnchor" number="8.2">
<h2><span class="header-section-number">8.2</span> Create an Arrow object using PyArrow in R<a href="using-pyarrow-from-r.html#create-an-arrow-object-using-pyarrow-in-r" class="anchor-section" aria-label="Anchor link to header"></a></h2>
<p>You want to use PyArrow to create an Arrow object in an R session.</p>
<div id="solution-42" class="section level3 hasAnchor" number="8.2.1">
<h3><span class="header-section-number">8.2.1</span> Solution<a href="using-pyarrow-from-r.html#solution-42" class="anchor-section" aria-label="Anchor link to header"></a></h3>
<div class="sourceCode" id="cb129"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb129-1"><a href="using-pyarrow-from-r.html#cb129-1" aria-hidden="true" tabindex="-1"></a><span class="fu">library</span>(reticulate)</span>
<span id="cb129-2"><a href="using-pyarrow-from-r.html#cb129-2" aria-hidden="true" tabindex="-1"></a>pa <span class="ot">&lt;-</span> <span class="fu">import</span>(<span class="st">&quot;pyarrow&quot;</span>)</span>
<span id="cb129-3"><a href="using-pyarrow-from-r.html#cb129-3" aria-hidden="true" tabindex="-1"></a>pyarrow_scalar <span class="ot">&lt;-</span> pa<span class="sc">$</span><span class="fu">scalar</span>(<span class="dv">42</span>)</span>
<span id="cb129-4"><a href="using-pyarrow-from-r.html#cb129-4" aria-hidden="true" tabindex="-1"></a>pyarrow_scalar</span></code></pre></div>
<pre><code>## &lt;pyarrow.DoubleScalar: 42.0&gt;</code></pre>
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<div id="call-a-pyarrow-function-from-r" class="section level2 hasAnchor" number="8.3">
<h2><span class="header-section-number">8.3</span> Call a PyArrow function from R<a href="using-pyarrow-from-r.html#call-a-pyarrow-function-from-r" class="anchor-section" aria-label="Anchor link to header"></a></h2>
<p>You want to call a PyArrow function from your R session.</p>
<div id="solution-43" class="section level3 hasAnchor" number="8.3.1">
<h3><span class="header-section-number">8.3.1</span> Solution<a href="using-pyarrow-from-r.html#solution-43" class="anchor-section" aria-label="Anchor link to header"></a></h3>
<div class="sourceCode" id="cb131"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb131-1"><a href="using-pyarrow-from-r.html#cb131-1" aria-hidden="true" tabindex="-1"></a>table_1 <span class="ot">&lt;-</span> <span class="fu">arrow_table</span>(mtcars[<span class="dv">1</span><span class="sc">:</span><span class="dv">5</span>,])</span>
<span id="cb131-2"><a href="using-pyarrow-from-r.html#cb131-2" aria-hidden="true" tabindex="-1"></a>table_2 <span class="ot">&lt;-</span> <span class="fu">arrow_table</span>(mtcars[<span class="dv">11</span><span class="sc">:</span><span class="dv">15</span>,])</span>
<span id="cb131-3"><a href="using-pyarrow-from-r.html#cb131-3" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb131-4"><a href="using-pyarrow-from-r.html#cb131-4" aria-hidden="true" tabindex="-1"></a>pa<span class="sc">$</span><span class="fu">concat_tables</span>(<span class="at">tables =</span> <span class="fu">list</span>(table_1, table_2)) <span class="sc">%&gt;%</span></span>
<span id="cb131-5"><a href="using-pyarrow-from-r.html#cb131-5" aria-hidden="true" tabindex="-1"></a> <span class="fu">collect</span>()</span></code></pre></div>
<pre><code>## # A tibble: 10 × 11
## mpg cyl disp hp drat wt qsec vs am gear carb
## &lt;dbl&gt; &lt;dbl&gt; &lt;dbl&gt; &lt;dbl&gt; &lt;dbl&gt; &lt;dbl&gt; &lt;dbl&gt; &lt;dbl&gt; &lt;dbl&gt; &lt;dbl&gt; &lt;dbl&gt;
## 1 21 6 160 110 3.9 2.62 16.5 0 1 4 4
## 2 21 6 160 110 3.9 2.88 17.0 0 1 4 4
## 3 22.8 4 108 93 3.85 2.32 18.6 1 1 4 1
## 4 21.4 6 258 110 3.08 3.22 19.4 1 0 3 1
## 5 18.7 8 360 175 3.15 3.44 17.0 0 0 3 2
## 6 17.8 6 168. 123 3.92 3.44 18.9 1 0 4 4
## 7 16.4 8 276. 180 3.07 4.07 17.4 0 0 3 3
## 8 17.3 8 276. 180 3.07 3.73 17.6 0 0 3 3
## 9 15.2 8 276. 180 3.07 3.78 18 0 0 3 3
## 10 10.4 8 472 205 2.93 5.25 18.0 0 0 3 4</code></pre>
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