NAME

App::GnuplotUtils - Utilities related to plotting data using gnuplot

VERSION

This document describes version 0.006 of App::GnuplotUtils (from Perl distribution App-GnuplotUtils), released on 2023-10-21.

DESCRIPTION

This distributions provides the following command-line utilities. They are mostly simple/convenience wrappers for gnuplot:

• xyplot

FUNCTIONS

xyplot

Usage:

 xyplot(%args) -> [$status_code, $reason, $payload, \%result_meta]

Plot XY dataset(s) using gnuplot.

This utility is a wrapper for gnuplot to quickly generate a graph from the command-line and view it using an image viewer program or a browser.

Specifying dataset

You can specify the dataset to plot directly from the command-line or specify filename to read the dataset from.

To plot directly from the command-line, specify comma-separated list of X & Y number pairs using --dataset-data option:

 % xyplot --dataset-data '1,1, 2,3, 3,5.5, 4,7.9, 6,11.5' ; # whitespaces are optional

To add more datasets, specify more --dataset-data options:

 % xyplot --dataset-data '1,1, 2,3, 3,5.5, 4,7.9, 6,11.5' \
          --dataset-data '1,4,2,4,3,2,4,9,5,3,6,6';         # will plot two lines

To add a title to your chart and every dataset, use --dataset-title:

 % xyplot --chart-title "my chart" \
          --dataset-title "foo" --dataset-data '1,1, 2,3, 3,5.5, 4,7.9, 6,11.5' \
          --dataset-title "bar" --dataset-data '1,4,2,4,3,2,4,9,5,3,6,6'

To specify dataset from files, use one or more --dataset-file options (or specify the filenames as arguments):

 % xyplot --dataset-file ds1.txt --dataset-file ds2.txt
 % xyplot ds1.txt ds2.txt

ds1.txt should contain comma, or whitespace-separated list of X & Y numbers. You can put one number per line or more.

 1 1
 2 3
 3 5.5
 4 7.9
 6 11.5
 8
 13.5
 9 14.2 10 14.8

To accept data from stdin, you can specify - as the filename:

 % tabulate-drug-concentration ... | xyplot -

Seeing plot result

xyplot uses Desktop::Open to view the resulting plot. The module will first find a suitable application, and failing that will use the web browser. If you specify --output-file (-o), the plot is written to the specified image file.

To see in a viewer program or browser and set the image format:

 % xyplot --output-format svg ...

If you want to use to force the browser:

 % PERL_DESKTOP_OPEN_USE_BROWSER=1 xyplot ...

If you want to set the program to use to open:

 % PERL_DESKTOP_OPEN_PROGRAM=google-chrome xyplot --output-format svg ...

Tips & Tricks

CSV format. If you have your data in CSV format, you can use csv-unquote to make sure your numbers are not quoted with double quotes, or you can use csv2tsv to convert your CSV to TSV first. Both utilities are included in App::CSVUtils.

Keywords

xychart, XY chart, XY plot

This function is not exported.

Arguments ('*' denotes required arguments):

• chart_title => str

  (No description)

• dataset_datas => array[str]

  Dataset(s).

• dataset_files => array[filename]

  Dataset(s) from file(s).

• dataset_styles => array[str]

  Dataset plot style(s).

• dataset_titles => array[str]

  Dataset title(s).

• field_delimiter => str

  Supply field delimiter character in dataset file instead of the default whitespace(s) or comma(s).

• output_file => filename

  (No description)

• output_format => str (default: "png")

  The output format is normally determined from the output filename's extension, e.g. foo.jpg. This option is for when you do not specify output filename and want to change the format from the default png.

• overwrite => bool

  (No description)

Returns an enveloped result (an array).

First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.

Return value: (any)

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/App-GnuplotUtils.

SOURCE

Source repository is at https://github.com/perlancar/perl-App-GnuplotUtils.

AUTHOR

perlancar <perlancar@cpan.org>

CONTRIBUTING

To contribute, you can send patches by email/via RT, or send pull requests on GitHub.

Most of the time, you don't need to build the distribution yourself. You can simply modify the code, then test via:

 % prove -l

If you want to build the distribution (e.g. to try to install it locally on your system), you can install Dist::Zilla, Dist::Zilla::PluginBundle::Author::PERLANCAR, Pod::Weaver::PluginBundle::Author::PERLANCAR, and sometimes one or two other Dist::Zilla- and/or Pod::Weaver plugins. Any additional steps required beyond that are considered a bug and can be reported to me.

COPYRIGHT AND LICENSE

This software is copyright (c) 2023, 2021, 2020, 2018 by perlancar <perlancar@cpan.org>.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=App-GnuplotUtils

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

cpanm App::GnuplotUtils

perl -MCPAN -e shell
install App::GnuplotUtils