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       <h1>CSV Reading Options</h1>
       <small class="dont-index">Source: <a href="https://github.com/apache/arrow/blob/main/r/R/csv.R" class="external-link"><code>R/csv.R</code></a></small>
       <div class="d-none name"><code>csv_read_options.Rd</code></div>
     </div>

     <div class="ref-description section level2">
     <p>CSV Reading Options</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">csv_read_options</span><span class="op">(</span></span>
 <span>  use_threads <span class="op">=</span> <span class="fu">option_use_threads</span><span class="op">(</span><span class="op">)</span>,</span>
 <span>  block_size <span class="op">=</span> <span class="fl">1048576L</span>,</span>
 <span>  skip_rows <span class="op">=</span> <span class="fl">0L</span>,</span>
 <span>  column_names <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/character.html" class="external-link">character</a></span><span class="op">(</span><span class="fl">0</span><span class="op">)</span>,</span>
 <span>  autogenerate_column_names <span class="op">=</span> <span class="cn">FALSE</span>,</span>
 <span>  encoding <span class="op">=</span> <span class="st">"UTF-8"</span>,</span>
 <span>  skip_rows_after_names <span class="op">=</span> <span class="fl">0L</span></span>
 <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-use-threads">use_threads<a class="anchor" aria-label="anchor" href="#arg-use-threads"></a></dt>
 <dd><p>Whether to use the global CPU thread pool</p></dd>


 <dt id="arg-block-size">block_size<a class="anchor" aria-label="anchor" href="#arg-block-size"></a></dt>
 <dd><p>Block size we request from the IO layer; also determines
 the size of chunks when use_threads is <code>TRUE</code>.</p></dd>


 <dt id="arg-skip-rows">skip_rows<a class="anchor" aria-label="anchor" href="#arg-skip-rows"></a></dt>
 <dd><p>Number of lines to skip before reading data (default 0).</p></dd>


 <dt id="arg-column-names">column_names<a class="anchor" aria-label="anchor" href="#arg-column-names"></a></dt>
 <dd><p>Character vector to supply column names. If length-0
 (the default), the first non-skipped row will be parsed to generate column
 names, unless <code>autogenerate_column_names</code> is <code>TRUE</code>.</p></dd>


 <dt id="arg-autogenerate-column-names">autogenerate_column_names<a class="anchor" aria-label="anchor" href="#arg-autogenerate-column-names"></a></dt>
 <dd><p>Logical: generate column names instead of
 using the first non-skipped row (the default)? If <code>TRUE</code>, column names will
 be "f0", "f1", ..., "fN".</p></dd>


 <dt id="arg-encoding">encoding<a class="anchor" aria-label="anchor" href="#arg-encoding"></a></dt>
 <dd><p>The file encoding. (default <code>"UTF-8"</code>)</p></dd>


 <dt id="arg-skip-rows-after-names">skip_rows_after_names<a class="anchor" aria-label="anchor" href="#arg-skip-rows-after-names"></a></dt>
 <dd><p>Number of lines to skip after the column names (default 0).
 This number can be larger than the number of rows in one block, and empty rows are counted.
 The order of application is as follows:
 - <code>skip_rows</code> is applied (if non-zero);
 - column names are read (unless <code>column_names</code> is set);
 - <code>skip_rows_after_names</code> is applied (if non-zero).</p></dd>

 </dl></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="va">tf</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/tempfile.html" class="external-link">tempfile</a></span><span class="op">(</span><span class="op">)</span></span></span>
 <span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/on.exit.html" class="external-link">on.exit</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/unlink.html" class="external-link">unlink</a></span><span class="op">(</span><span class="va">tf</span><span class="op">)</span><span class="op">)</span></span></span>
 <span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/writeLines.html" class="external-link">writeLines</a></span><span class="op">(</span><span class="st">"my file has a non-data header\nx\n1\n2"</span>, <span class="va">tf</span><span class="op">)</span></span></span>
 <span class="r-in"><span><span class="fu"><a href="read_delim_arrow.html">read_csv_arrow</a></span><span class="op">(</span><span class="va">tf</span>, read_options <span class="op">=</span> <span class="fu">csv_read_options</span><span class="op">(</span>skip_rows <span class="op">=</span> <span class="fl">1</span><span class="op">)</span><span class="op">)</span></span></span>
 <span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #949494;"># A tibble: 2 x 1</span></span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>       x</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span>   <span style="color: #949494; font-style: italic;">&lt;int&gt;</span></span>
 <span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;">1</span>     1</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span> <span style="color: #BCBCBC;">2</span>     2</span>
 <span class="r-in"><span><span class="fu"><a href="open_delim_dataset.html">open_csv_dataset</a></span><span class="op">(</span><span class="va">tf</span>, read_options <span class="op">=</span> <span class="fu">csv_read_options</span><span class="op">(</span>skip_rows <span class="op">=</span> <span class="fl">1</span><span class="op">)</span><span class="op">)</span></span></span>
 <span class="r-out co"><span class="r-pr">#&gt;</span> FileSystemDataset with 1 csv file</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span> 1 columns</span>
 <span class="r-out co"><span class="r-pr">#&gt;</span> x: int64</span>
 </code></pre></div>
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	<div class="row">
	<main id="main" class="col-md-9"><div class="page-header">

	<h1>CSV Reading Options</h1>
	<small class="dont-index">Source: <a href="https://github.com/apache/arrow/blob/main/r/R/csv.R" class="external-link"><code>R/csv.R</code></a></small>
	<div class="d-none name"><code>csv_read_options.Rd</code></div>
	</div>

	<div class="ref-description section level2">
	<p>CSV Reading Options</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">csv_read_options</span><span class="op">(</span></span>
	<span> use_threads <span class="op">=</span> <span class="fu">option_use_threads</span><span class="op">(</span><span class="op">)</span>,</span>
	<span> block_size <span class="op">=</span> <span class="fl">1048576L</span>,</span>
	<span> skip_rows <span class="op">=</span> <span class="fl">0L</span>,</span>
	<span> column_names <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/character.html" class="external-link">character</a></span><span class="op">(</span><span class="fl">0</span><span class="op">)</span>,</span>
	<span> autogenerate_column_names <span class="op">=</span> <span class="cn">FALSE</span>,</span>
	<span> encoding <span class="op">=</span> <span class="st">"UTF-8"</span>,</span>
	<span> skip_rows_after_names <span class="op">=</span> <span class="fl">0L</span></span>
	<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-use-threads">use_threads<a class="anchor" aria-label="anchor" href="#arg-use-threads"></a></dt>
	<dd><p>Whether to use the global CPU thread pool</p></dd>


	<dt id="arg-block-size">block_size<a class="anchor" aria-label="anchor" href="#arg-block-size"></a></dt>
	<dd><p>Block size we request from the IO layer; also determines
	the size of chunks when use_threads is <code>TRUE</code>.</p></dd>


	<dt id="arg-skip-rows">skip_rows<a class="anchor" aria-label="anchor" href="#arg-skip-rows"></a></dt>
	<dd><p>Number of lines to skip before reading data (default 0).</p></dd>


	<dt id="arg-column-names">column_names<a class="anchor" aria-label="anchor" href="#arg-column-names"></a></dt>
	<dd><p>Character vector to supply column names. If length-0
	(the default), the first non-skipped row will be parsed to generate column
	names, unless <code>autogenerate_column_names</code> is <code>TRUE</code>.</p></dd>


	<dt id="arg-autogenerate-column-names">autogenerate_column_names<a class="anchor" aria-label="anchor" href="#arg-autogenerate-column-names"></a></dt>
	<dd><p>Logical: generate column names instead of
	using the first non-skipped row (the default)? If <code>TRUE</code>, column names will
	be "f0", "f1", ..., "fN".</p></dd>


	<dt id="arg-encoding">encoding<a class="anchor" aria-label="anchor" href="#arg-encoding"></a></dt>
	<dd><p>The file encoding. (default <code>"UTF-8"</code>)</p></dd>


	<dt id="arg-skip-rows-after-names">skip_rows_after_names<a class="anchor" aria-label="anchor" href="#arg-skip-rows-after-names"></a></dt>
	<dd><p>Number of lines to skip after the column names (default 0).
	This number can be larger than the number of rows in one block, and empty rows are counted.
	The order of application is as follows:
	- <code>skip_rows</code> is applied (if non-zero);
	- column names are read (unless <code>column_names</code> is set);
	- <code>skip_rows_after_names</code> is applied (if non-zero).</p></dd>

	</dl></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="va">tf</span> <span class="op"><-</span> <span class="fu"><a href="https://rdrr.io/r/base/tempfile.html" class="external-link">tempfile</a></span><span class="op">(</span><span class="op">)</span></span></span>
	<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/on.exit.html" class="external-link">on.exit</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/unlink.html" class="external-link">unlink</a></span><span class="op">(</span><span class="va">tf</span><span class="op">)</span><span class="op">)</span></span></span>
	<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/writeLines.html" class="external-link">writeLines</a></span><span class="op">(</span><span class="st">"my file has a non-data header\nx\n1\n2"</span>, <span class="va">tf</span><span class="op">)</span></span></span>
	<span class="r-in"><span><span class="fu"><a href="read_delim_arrow.html">read_csv_arrow</a></span><span class="op">(</span><span class="va">tf</span>, read_options <span class="op">=</span> <span class="fu">csv_read_options</span><span class="op">(</span>skip_rows <span class="op">=</span> <span class="fl">1</span><span class="op">)</span><span class="op">)</span></span></span>
	<span class="r-out co"><span class="r-pr">#></span> <span style="color: #949494;"># A tibble: 2 x 1</span></span>
	<span class="r-out co"><span class="r-pr">#></span> x</span>
	<span class="r-out co"><span class="r-pr">#></span> <span style="color: #949494; font-style: italic;"><int></span></span>
	<span class="r-out co"><span class="r-pr">#></span> <span style="color: #BCBCBC;">1</span> 1</span>
	<span class="r-out co"><span class="r-pr">#></span> <span style="color: #BCBCBC;">2</span> 2</span>
	<span class="r-in"><span><span class="fu"><a href="open_delim_dataset.html">open_csv_dataset</a></span><span class="op">(</span><span class="va">tf</span>, read_options <span class="op">=</span> <span class="fu">csv_read_options</span><span class="op">(</span>skip_rows <span class="op">=</span> <span class="fl">1</span><span class="op">)</span><span class="op">)</span></span></span>
	<span class="r-out co"><span class="r-pr">#></span> FileSystemDataset with 1 csv file</span>
	<span class="r-out co"><span class="r-pr">#></span> 1 columns</span>
	<span class="r-out co"><span class="r-pr">#></span> x: int64</span>
	</code></pre></div>
	</div>
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