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| in the Arrow C data interface. At the R level, we attach a |
| schema such that functionally the nanoarrow_array |
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| are represented identically."><meta property="og:description" content="In nanoarrow an 'array' refers to the struct ArrowArray definition |
| in the Arrow C data interface. At the R level, we attach a |
| schema such that functionally the nanoarrow_array |
| class can be used in a similar way as an arrow::Array. Note that in |
| nanoarrow an arrow::RecordBatch and a non-nullable arrow::StructArray |
| are represented identically."></head><body> |
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| <h1>Convert an object to a nanoarrow array</h1> |
| <small class="dont-index">Source: <a href="https://github.com/apache/arrow-nanoarrow/blob/main/r/R/array.R" class="external-link"><code>R/array.R</code></a></small> |
| <div class="d-none name"><code>as_nanoarrow_array.Rd</code></div> |
| </div> |
| |
| <div class="ref-description section level2"> |
| <p>In nanoarrow an 'array' refers to the <code>struct ArrowArray</code> definition |
| in the Arrow C data interface. At the R level, we attach a |
| <a href="as_nanoarrow_schema.html">schema</a> such that functionally the nanoarrow_array |
| class can be used in a similar way as an <code><a href="https://arrow.apache.org/docs/r/reference/array-class.html" class="external-link">arrow::Array</a></code>. Note that in |
| nanoarrow an <code><a href="https://arrow.apache.org/docs/r/reference/RecordBatch-class.html" class="external-link">arrow::RecordBatch</a></code> and a non-nullable <code><a href="https://arrow.apache.org/docs/r/reference/array-class.html" class="external-link">arrow::StructArray</a></code> |
| are represented identically.</p> |
| </div> |
| |
| <div class="section level2"> |
| <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2> |
| <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">as_nanoarrow_array</span><span class="op">(</span><span class="va">x</span>, <span class="va">...</span>, schema <span class="op">=</span> <span class="cn">NULL</span><span class="op">)</span></span></code></pre></div> |
| </div> |
| |
| <div class="section level2"> |
| <h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2> |
| |
| |
| <dl><dt id="arg-x">x<a class="anchor" aria-label="anchor" href="#arg-x"></a></dt> |
| <dd><p>An object to convert to a array</p></dd> |
| |
| |
| <dt id="arg--">...<a class="anchor" aria-label="anchor" href="#arg--"></a></dt> |
| <dd><p>Passed to S3 methods</p></dd> |
| |
| |
| <dt id="arg-schema">schema<a class="anchor" aria-label="anchor" href="#arg-schema"></a></dt> |
| <dd><p>An optional schema used to enforce conversion to a particular |
| type. Defaults to <code><a href="as_nanoarrow_schema.html">infer_nanoarrow_schema()</a></code>.</p></dd> |
| |
| </dl></div> |
| <div class="section level2"> |
| <h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2> |
| <p>An object of class 'nanoarrow_array'</p> |
| </div> |
| |
| <div class="section level2"> |
| <h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></h2> |
| <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="op">(</span><span class="va">array</span> <span class="op"><-</span> <span class="fu">as_nanoarrow_array</span><span class="op">(</span><span class="fl">1</span><span class="op">:</span><span class="fl">5</span><span class="op">)</span><span class="op">)</span></span></span> |
| <span class="r-out co"><span class="r-pr">#></span> <nanoarrow_array int32[5]></span> |
| <span class="r-out co"><span class="r-pr">#></span> $ length : int 5</span> |
| <span class="r-out co"><span class="r-pr">#></span> $ null_count: int 0</span> |
| <span class="r-out co"><span class="r-pr">#></span> $ offset : int 0</span> |
| <span class="r-out co"><span class="r-pr">#></span> $ buffers :List of 2</span> |
| <span class="r-out co"><span class="r-pr">#></span> ..$ :<nanoarrow_buffer validity<bool>[0][0 b]> ``</span> |
| <span class="r-out co"><span class="r-pr">#></span> ..$ :<nanoarrow_buffer data<int32>[5][20 b]> `1 2 3 4 5`</span> |
| <span class="r-out co"><span class="r-pr">#></span> $ dictionary: NULL</span> |
| <span class="r-out co"><span class="r-pr">#></span> $ children : list()</span> |
| <span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/vector.html" class="external-link">as.vector</a></span><span class="op">(</span><span class="va">array</span><span class="op">)</span></span></span> |
| <span class="r-out co"><span class="r-pr">#></span> [1] 1 2 3 4 5</span> |
| <span class="r-in"><span></span></span> |
| <span class="r-in"><span><span class="op">(</span><span class="va">array</span> <span class="op"><-</span> <span class="fu">as_nanoarrow_array</span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/data.frame.html" class="external-link">data.frame</a></span><span class="op">(</span>x <span class="op">=</span> <span class="fl">1</span><span class="op">:</span><span class="fl">5</span><span class="op">)</span><span class="op">)</span><span class="op">)</span></span></span> |
| <span class="r-out co"><span class="r-pr">#></span> <nanoarrow_array struct[5]></span> |
| <span class="r-out co"><span class="r-pr">#></span> $ length : int 5</span> |
| <span class="r-out co"><span class="r-pr">#></span> $ null_count: int 0</span> |
| <span class="r-out co"><span class="r-pr">#></span> $ offset : int 0</span> |
| <span class="r-out co"><span class="r-pr">#></span> $ buffers :List of 1</span> |
| <span class="r-out co"><span class="r-pr">#></span> ..$ :<nanoarrow_buffer validity<bool>[0][0 b]> ``</span> |
| <span class="r-out co"><span class="r-pr">#></span> $ children :List of 1</span> |
| <span class="r-out co"><span class="r-pr">#></span> ..$ x:<nanoarrow_array int32[5]></span> |
| <span class="r-out co"><span class="r-pr">#></span> .. ..$ length : int 5</span> |
| <span class="r-out co"><span class="r-pr">#></span> .. ..$ null_count: int 0</span> |
| <span class="r-out co"><span class="r-pr">#></span> .. ..$ offset : int 0</span> |
| <span class="r-out co"><span class="r-pr">#></span> .. ..$ buffers :List of 2</span> |
| <span class="r-out co"><span class="r-pr">#></span> .. .. ..$ :<nanoarrow_buffer validity<bool>[0][0 b]> ``</span> |
| <span class="r-out co"><span class="r-pr">#></span> .. .. ..$ :<nanoarrow_buffer data<int32>[5][20 b]> `1 2 3 4 5`</span> |
| <span class="r-out co"><span class="r-pr">#></span> .. ..$ dictionary: NULL</span> |
| <span class="r-out co"><span class="r-pr">#></span> .. ..$ children : list()</span> |
| <span class="r-out co"><span class="r-pr">#></span> $ dictionary: NULL</span> |
| <span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/as.data.frame.html" class="external-link">as.data.frame</a></span><span class="op">(</span><span class="va">array</span><span class="op">)</span></span></span> |
| <span class="r-out co"><span class="r-pr">#></span> x</span> |
| <span class="r-out co"><span class="r-pr">#></span> 1 1</span> |
| <span class="r-out co"><span class="r-pr">#></span> 2 2</span> |
| <span class="r-out co"><span class="r-pr">#></span> 3 3</span> |
| <span class="r-out co"><span class="r-pr">#></span> 4 4</span> |
| <span class="r-out co"><span class="r-pr">#></span> 5 5</span> |
| <span class="r-in"><span></span></span> |
| </code></pre></div> |
| </div> |
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