count_fields

This is useful for diagnosing problems with functions that fail
to parse correctly.

The goal of 'readr' is to provide a fast and friendly way to
read rectangular data (like 'csv', 'tsv', and 'fwf').  It is designed
to flexibly parse many types of data found in the wild, while still
cleanly failing when data unexpectedly changes.

Jennifer Bryan

readr

Read Rectangular Text Data

Hadley Wickham

Jim Hester

Romain Francois

Shelby Bearrows

Posit Software, PBC 

https://github.com/mandreyel/ 

Jukka Jylänki

Mikkel Jørgensen

count_fields function

<dl><dt>file</dt>
<dd>Either a path to a file, a connection, or literal data
(either a single string or a raw vector).
Files ending in <code>.gz</code>, <code>.bz2</code>, <code>.xz</code>, or <code>.zip</code> will
be automatically uncompressed. Files starting with <code>http://</code>,
<code>https://</code>, <code>ftp://</code>, or <code>ftps://</code> will be automatically
downloaded. Remote gz files can also be automatically downloaded and
decompressed.
Literal data is most useful for examples and tests. To be recognised as
literal data, the input must be either wrapped with <code><a href="/link/I()?package=readr&version=2.1.5" data-mini-rdoc="readr::I()">I()</a></code>, be a string
containing at least one new line, or be a vector containing at least one
string with a new line.
Using a value of <code><a href="/link/clipboard()?package=readr&version=2.1.5" data-mini-rdoc="readr::clipboard()">clipboard()</a></code> will read from the system clipboard.</dd>
<dt>tokenizer</dt>
<dd>A tokenizer that specifies how to break the <code>file</code>
up into fields, e.g., <code>tokenizer_csv()</code>,
<code>tokenizer_fwf()</code></dd>
<dt>skip</dt>
<dd>Number of lines to skip before reading data.</dd>
<dt>n_max</dt>
<dd>Optionally, maximum number of rows to count fields for.</dd></dl>

Arguments

Count the number of fields in each line of a file — count_fields

<dl>

<dt>file</dt>
<dd>Either a path to a file, a connection, or literal data
(either a single string or a raw vector).
Files ending in <code>.gz</code>, <code>.bz2</code>, <code>.xz</code>, or <code>.zip</code> will
be automatically uncompressed. Files starting with <code>http://</code>,
<code>https://</code>, <code>ftp://</code>, or <code>ftps://</code> will be automatically
downloaded. Remote gz files can also be automatically downloaded and
decompressed.
Literal data is most useful for examples and tests. To be recognised as
literal data, the input must be either wrapped with <code><a href='https://rdrr.io/r/base/AsIs.html'>I()</a></code>, be a string
containing at least one new line, or be a vector containing at least one
string with a new line.
Using a value of <code><a href='https://rdrr.io/r/utils/clipboard.html'>clipboard()</a></code> will read from the system clipboard.</dd>


<dt>tokenizer</dt>
<dd>A tokenizer that specifies how to break the <code>file</code>
up into fields, e.g., <code>tokenizer_csv()</code>,
<code>tokenizer_fwf()</code></dd>


<dt>skip</dt>
<dd>Number of lines to skip before reading data.</dd>


<dt>n_max</dt>
<dd>Optionally, maximum number of rows to count fields for.</dd>

</dl>

Count the number of fields in each line of a file

count_fields: Count the number of fields in each line of a file

Description

Usage

Arguments

Examples