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NAME

Chart::Gnuplot - A Raku bindings for gnuplot

SYNOPSIS

SOURCE

use Chart::Gnuplot;
use Chart::Gnuplot::Subset;
my $gnu = Chart::Gnuplot.new(:terminal("png"), :filename("histogram.png"));

my @data = (q:to/EOF/).split("\n", :skip-empty)>>.split(" ", :skip-empty);
Year Male Female
1950 100 90
1960 100 90
1970 80 70
1980 130 140
1990 140 120
2000 200 210
2010 240 230
2020 400 420
EOF

my ($header, *@body) = @data;

$gnu.command("set style histogram clustered");
$gnu.legend(:left);
my AnyTicsTic @tics = (@body>>.[0]).pairs.map(-> (:key($pos), :value($year)) { %(:label($year), :pos($pos)) });
$gnu.xtics(:tics(@tics));
$gnu.xlabel(:label($header[0]));
$gnu.plot(:vertices(@body), :using([2]), :style("histogram"), :title($header[1]), :fill("solid 1.0"));
$gnu.plot(:vertices(@body), :using([3]), :style("histogram"), :title($header[2]), :fill("solid 1.0"));

$gnu.dispose;

OUTPUT

histogram

DESCRIPTION

Chart::Gnuplot is a Raku naive bindings for gnuplot. Chart::Gnuplot runs gnuplot using Proc::Async and enables you to plot chart or graph with Rakuish interface.

SUBSET

Defined as:

subset FalseOnly of Bool is export where { $_ ~~ Bool:U or $_ === False };
subset TrueOnly of Bool is export where { $_ ~~ Bool:U or $_ === True};
subset LabelRotate of Cool is export where { $_ ~~ Cool:U or $_ ~~ Real or $_ === False };
subset AnyLabelRotate of Cool is export where { $_ ~~ Cool:U or $_ eq "parallel" or $_ ~~ Real or $_ === False };
subset LegendMax of Cool is export where { $_ ~~ Cool:U or $_ eq "auto" or $_ ~~ Real };
subset AnyTicsRotate of Cool is export where { $_ ~~ Cool:U or $_ ~~ Real or $_ === False };
subset AnyTicsOffset of Mu is export where { $_ ~~ Mu:U or $_ ~~ FalseOnly or ($_ ~~ List and $_.all ~~ Pair|Real) };
subset AnyTicsTic of Mu is export where { $_ ~~ Mu:U or $_ ~~ Hash and .<label>:exists and .<pos>:exists and .keys.grep(* eq "label"|"pos"|"level").elems == .keys.elems };

METHODS

terminal

Defined as:

method terminal($terminal)

Tells gnuplot what kind of output to generate.

plot

Defined as:

multi method plot(
        :$title, :$ignore, :@range, :@vertices!, :$smooth,
        :@using,
        Str :$style, :ls(:$linestyle), :lt(:$linetype), :lw(:$linewidth), :lc(:$linecolor),
        :pt(:$pointtype), :ps(:$pointsize), :$fill, FalseOnly :$hidden3d, FalseOnly :$contours,
        FalseOnly :$surface, :$palette,
        :&writer? = -> $msg { self.command: $msg }
)

multi method plot(
      :$title, :$ignore, :@range, :$function!, :$smooth,
      Str :$style, :ls(:$linestyle), :lt(:$linetype), :lw(:$linewidth), :lc(:$linecolor),
      :pt(:$pointtype), :ps(:$pointsize), :$fill, FalseOnly :$hidden3d, FalseOnly :$contours,
      FalseOnly :$surface, :$palette,
      :&writer? = -> $msg { self.command: $msg }
)

Draws a 2-dimensional plot.

splot

Defined as:

multi method splot(
      :@range,
      :@vertices!, :$smooth,
      :$binary, :$matrix, :$index, :$every,
      :$title, :$style, :ls(:$linestyle), :lt(:$linetype), :lw(:$linewidth), :lc(:$linecolor),
      :$pointtype, :$pointsize, :$fill, FalseOnly :$hidden3d, FalseOnly :$contours,
      FalseOnly :$surface, :$palette, :&writer? = -> $msg { self.command: $msg }
)

multi method splot(
      :@range,
      :$function!, :$smooth,
      :$title, :$style, :ls(:$linestyle), :lt(:$linetype), :lw(:$linewidth), :lc(:$linecolor),
      :$pointtype, :$pointsize, :$fill, FalseOnly :$hidden3d, FalseOnly :$contours,
      FalseOnly :$surface, :$palette, :&writer? = -> $msg { self.command: $msg }
)

Draws a 3-dimensional plot.

label

Defined as:

method label(
       :$tag, Str :$label-text, :$at, TrueOnly :$left, TrueOnly :$center, TrueOnly :$right,
       LabelRotate :$rotate, :$font-name, :$font-size, FalseOnly :$enhanced,
       TrueOnly :$front, TrueOnly :$back, :$textcolor, FalseOnly :$point, :$line-type, :$point-type, :$point-size, :$offset,
       TrueOnly :$boxed, TrueOnly :$hypertext, :&writer? = -> $msg { self.command: $msg }
)

Places the text string at the corresponding 2D or 3D position.

xlabel

Defined as:

method xlabel(
       Str :$label, :$offset, :$font-name, :$font-size, :$textcolor,
       Bool :$enhanced, AnyLabelRotate :$rotate, :&writer? = -> $msg { self.command: $msg }
)

Sets the x-axis label.

ylabel

Defined as:

method ylabel(
       Str :$label, :$offset, :$font-name, :$font-size, :$textcolor,
       Bool :$enhanced, AnyLabelRotate :$rotate, :&writer? = -> $msg { self.command: $msg }
)

Sets the y-axis label.

zlabel

Defined as:

method zlabel(
       Str :$label, :$offset, :$font-name, :$font-size, :$textcolor,
       Bool :$enhanced, AnyLabelRotate :$rotate, :&writer? = -> $msg { self.command: $msg }
)

Sets the z-axis label.

x2label

Defined as:

method x2label(
       Str :$label, :$offset, :$font-name, :$font-size, :$textcolor,
       Bool :$enhanced, AnyLabelRotate :$rotate, :&writer? = -> $msg { self.command: $msg }
)

Sets the x2-axis label.

y2label

Defined as:

method y2label(
       Str :$label, :$offset, :$font-name, :$font-size, :$textcolor,
       Bool :$enhanced, AnyLabelRotate :$rotate, :&writer? = -> $msg { self.command: $msg }
)

Sets the y2-axis label.

cblabel

Defined as:

method cblabel(
       Str :$label, :$offset, :$font-name, :$font-size, :$textcolor,
       Bool :$enhanced, AnyLabelRotate :$rotate, :&writer? = -> $msg { self.command: $msg }
)

Sets the cb-axis label.

xrange

Defined as:

multi method xrange(
      :$min, :$max, Bool :$reverse, Bool :$writeback, Bool :$extend,
      :&writer? = -> $msg { self.command: $msg }
)

multi method xrange(TrueOnly :$restore, :&writer? = -> $msg { self.command: $msg })

Sets the horizontal range that will be displayed.

yrange

Defined as:

multi method yrange(
      :$min, :$max, Bool :$reverse, Bool :$writeback, Bool :$extend,
      :&writer? = -> $msg { self.command: $msg }
)

multi method yrange(TrueOnly :$restore, :&writer? = -> $msg { self.command: $msg })

Sets the vertical range that will be displayed.

zrange

Defined as:

multi method zrange(
      :$min, :$max, Bool :$reverse, Bool :$writeback, Bool :$extend,
      :&writer? = -> $msg { self.command: $msg }
)

multi method zrange(TrueOnly :$restore, :&writer? = -> $msg { self.command: $msg })

Sets the range that will be displayed on the z axis.

x2range

Defined as:

multi method x2range(
      :$min, :$max, Bool :$reverse, Bool :$writeback, Bool :$extend,
      :&writer? = -> $msg { self.command: $msg }
)

multi method x2range(TrueOnly :$restore, :&writer? = -> $msg { self.command: $msg })

Sets the range that will be displayed on the x2 axis.

y2range

Defined as:

multi method y2range(
      :$min, :$max, Bool :$reverse, Bool :$writeback, Bool :$extend,
      :&writer? = -> $msg { self.command: $msg }
)

multi method y2range(TrueOnly :$restore, :&writer? = -> $msg { self.command: $msg })

Sets the range that will be displayed on the y2 axis.

cbrange

Defined as:

multi method cbrange(
      :$min, :$max, Bool :$reverse, Bool :$writeback, Bool :$extend,
      :&writer? = -> $msg { self.command: $msg }
)

multi method cbrange(TrueOnly :$restore, :&writer? = -> $msg { self.command: $msg })

Sets the range of values which are colored.

rrange

Defined as:

multi method rrange(
      :$min, :$max, Bool :$reverse, Bool :$writeback, Bool :$extend,
      :&writer? = -> $msg { self.command: $msg }
)

multi method rrange(TrueOnly :$restore, :&writer? = -> $msg { self.command: $msg })

Sets the range that will be displayed on the r axis.

trange

Defined as:

multi method trange(
      :$min, :$max, Bool :$reverse, Bool :$writeback, Bool :$extend,
      :&writer? = -> $msg { self.command: $msg }
)

multi method trange(TrueOnly :$restore, :&writer? = -> $msg { self.command: $msg })

Sets the parametric range used to compute x and y values when in parametric or polar modes.

urange

Defined as:

multi method urange(
      :$min, :$max, Bool :$reverse, Bool :$writeback, Bool :$extend,
      :&writer? = -> $msg { self.command: $msg }
)

multi method urange(TrueOnly :$restore, :&writer? = -> $msg { self.command: $msg })

Set the parametric ranges used to compute x, y, and z values when in splot parametric mode.

vrange

Defined as:

multi method vrange(
      :$min, :$max, Bool :$reverse, Bool :$writeback, Bool :$extend,
      :&writer? = -> $msg { self.command: $msg }
)

multi method vrange(TrueOnly :$restore, :&writer? = -> $msg { self.command: $msg })

Set the parametric ranges used to compute x, y, and z values when in splot parametric mode.

xtics

Defined as:

method xtics(
       TrueOnly :$axis, TrueOnly :$border, Bool :$mirror,
       TrueOnly :$in, TrueOnly :$out, TrueOnly :$scale-default, :$scale-major, :$scale-minor, AnyTicsRotate :$rotate, AnyTicsOffset :$offset,
       TrueOnly :$left, TrueOnly :$right, TrueOnly :$center, TrueOnly :$autojustify,
       TrueOnly :$add,
       TrueOnly :$autofreq,
       :$incr,
       :$start, :$end,
       :@tics where Array[AnyTicsTic] | Array[],
       :$format, :$font-name, :$font-size, Bool :$enhanced,
       TrueOnly :$numeric, TrueOnly :$timedate, TrueOnly :$geographic,
       TrueOnly :$rangelimited,
       :$textcolor, :&writer? = -> $msg { self.command: $msg }
)

Controls the major (labeled) tics on the x axis.

ytics

Defined as:

method ytics(
       TrueOnly :$axis, TrueOnly :$border, Bool :$mirror,
       TrueOnly :$in, TrueOnly :$out, TrueOnly :$scale-default, :$scale-major, :$scale-minor, AnyTicsRotate :$rotate, AnyTicsOffset :$offset,
       TrueOnly :$left, TrueOnly :$right, TrueOnly :$center, TrueOnly :$autojustify,
       TrueOnly :$add,
       TrueOnly :$autofreq,
       :$incr,
       :$start, :$end,
       :@tics where Array[AnyTicsTic] | Array[],
       :$format, :$font-name, :$font-size, Bool :$enhanced,
       TrueOnly :$numeric, TrueOnly :$timedate, TrueOnly :$geographic,
       TrueOnly :$rangelimited,
       :$textcolor, :&writer? = -> $msg { self.command: $msg }
)

Controls the major (labeled) tics on the y axis.

ztics

Defined as:

method ztics(
       TrueOnly :$axis, TrueOnly :$border, Bool :$mirror,
       TrueOnly :$in, TrueOnly :$out, TrueOnly :$scale-default, :$scale-major, :$scale-minor, AnyTicsRotate :$rotate, AnyTicsOffset :$offset,
       TrueOnly :$left, TrueOnly :$right, TrueOnly :$center, TrueOnly :$autojustify,
       TrueOnly :$add,
       TrueOnly :$autofreq,
       :$incr,
       :$start, :$end,
       :@tics where Array[AnyTicsTic] | Array[],
       :$format, :$font-name, :$font-size, Bool :$enhanced,
       TrueOnly :$numeric, TrueOnly :$timedate, TrueOnly :$geographic,
       TrueOnly :$rangelimited,
       :$textcolor, :&writer? = -> $msg { self.command: $msg }
)

Controls the major (labeled) tics on the z axis.

x2tics

Defined as:

method x2tics(
       TrueOnly :$axis, TrueOnly :$border, Bool :$mirror,
       TrueOnly :$in, TrueOnly :$out, TrueOnly :$scale-default, :$scale-major, :$scale-minor, AnyTicsRotate :$rotate, AnyTicsOffset :$offset,
       TrueOnly :$left, TrueOnly :$right, TrueOnly :$center, TrueOnly :$autojustify,
       TrueOnly :$add,
       TrueOnly :$autofreq,
       :$incr,
       :$start, :$end,
       :@tics where Array[AnyTicsTic] | Array[],
       :$format, :$font-name, :$font-size, Bool :$enhanced,
       TrueOnly :$numeric, TrueOnly :$timedate, TrueOnly :$geographic,
       TrueOnly :$rangelimited,
       :$textcolor, :&writer? = -> $msg { self.command: $msg }
)

Controls the major (labeled) tics on the x2 axis.

y2tics

Defined as:

method y2tics(
       TrueOnly :$axis, TrueOnly :$border, Bool :$mirror,
       TrueOnly :$in, TrueOnly :$out, TrueOnly :$scale-default, :$scale-major, :$scale-minor, AnyTicsRotate :$rotate, AnyTicsOffset :$offset,
       TrueOnly :$left, TrueOnly :$right, TrueOnly :$center, TrueOnly :$autojustify,
       TrueOnly :$add,
       TrueOnly :$autofreq,
       :$incr,
       :$start, :$end,
       :@tics where Array[AnyTicsTic] | Array[],
       :$format, :$font-name, :$font-size, Bool :$enhanced,
       TrueOnly :$numeric, TrueOnly :$timedate, TrueOnly :$geographic,
       TrueOnly :$rangelimited,
       :$textcolor, :&writer? = -> $msg { self.command: $msg }
)

Controls the major (labeled) tics on the y2 axis.

cbtics

Defined as:

method cbtics(
       TrueOnly :$axis, TrueOnly :$border, Bool :$mirror,
       TrueOnly :$in, TrueOnly :$out, TrueOnly :$scale-default, :$scale-major, :$scale-minor, AnyTicsRotate :$rotate, AnyTicsOffset :$offset,
       TrueOnly :$left, TrueOnly :$right, TrueOnly :$center, TrueOnly :$autojustify,
       TrueOnly :$add,
       TrueOnly :$autofreq,
       :$incr,
       :$start, :$end,
       :@tics where Array[AnyTicsTic] | Array[],
       :$format, :$font-name, :$font-size, Bool :$enhanced,
       TrueOnly :$numeric, TrueOnly :$timedate, TrueOnly :$geographic,
       TrueOnly :$rangelimited,
       :$textcolor, :&writer? = -> $msg { self.command: $msg }
)

Controls the major (labeled) tics on the color box axis.

legend

Defined as:

method legend(
       TrueOnly :$on, TrueOnly :$off, TrueOnly :$default, TrueOnly :$inside, TrueOnly :$outside, TrueOnly :$lmargin, TrueOnly :$rmargin, TrueOnly :$tmargin, TrueOnly :$bmargin,
       :$at,
       TrueOnly :$left, TrueOnly :$right, TrueOnly :$center, TrueOnly :$top, TrueOnly :$bottom,
       TrueOnly :$vertical, TrueOnly :$horizontal, TrueOnly :$Left, TrueOnly :$Right,
       Bool :$opaque, Bool :$reverse, Bool :$invert,
       :$samplen, :$spacing, :$width, :$height,
       TrueOnly :$autotitle, TrueOnly :$columnheader, :$title, :$font-name, :$font-size, :$textcolor,
       Bool :$box, :$linestyle, :$linetype, :$linewidth,
       LegendMax :$maxcols, LegendMax :$maxrows, :&writer? = -> $msg { self.command: $msg }
)

Enables a key (or legend) containing a title and a sample (line, point, box) for each plot in the graph.

border

Defined as:

method border(
       :$integer, TrueOnly :$front, TrueOnly :$back, TrueOnly :$behind,
       :lw(:$linewidth), :ls(:$linestyle), :lt(:$linetype), :&writer? = -> $msg { self.command: $msg }
)

Controls the display of the graph borders for the plot and splot commands.

grid

Defined as:

method grid(
       Bool :$xtics, TrueOnly :$mxtics, Bool :$ytics, TrueOnly :$mytics, Bool :$ztics, TrueOnly :$mztics,
       Bool :$x2tics, TrueOnly :$mx2tics, Bool :$y2tics, TrueOnly :$my2tics, Bool :$cbtics, TrueOnly :$mcbtics,
       :$polar, TrueOnly :$layerdefault, TrueOnly :$front, TrueOnly :$back,
       :ls(:@linestyle), :lt(:@linetype), :lw(:@linewidth), :&writer? = -> $msg { self.command: $msg }
)

Allows grid lines to be drawn on the plot.

timestamp

Defined as:

method timestamp(
        Str :$format, TrueOnly :$top, TrueOnly :$bottom, Bool :$rotate,
        :$offset, :$font-name, :$font-size, :$textcolor, :&writer? = -> $msg { self.command: $msg }
)

Places the time and date of the plot in the left margin.

rectangle

Defined as:

multi method rectangle(
      :$index!, :$from, :$to,
      TrueOnly :$front, TrueOnly :$back, TrueOnly :$behind, Bool :$clip, :$fillcolor, :$fillstyle,
      TrueOnly :$default, :$linewidth, :$dashtype, :&writer? = -> $msg { self.command: $msg }
)

multi method rectangle(
      :$index, :$from, :$rto,
      TrueOnly :$front, TrueOnly :$back, TrueOnly :$behind, Bool :$clip, :$fillcolor, :$fillstyle,
      TrueOnly :$default, :$linewidth, :$dashtype, :&writer? = -> $msg { self.command: $msg }
)

Defines a single rectangle which will appear in all subsequent 2D plot.

ellipse

Defined as:

method ellipse(
       :$index, :center(:$at), :$w!, :$h!,
       TrueOnly :$front, TrueOnly :$back, TrueOnly :$behind, Bool :$clip, :$fillcolor, :$fillstyle,
       TrueOnly :$default, :$linewidth, :$dashtype, :&writer? = -> $msg { self.command: $msg }
)

Defines a single ellipse which will appear in all subsequent 2D plot.

circle

Defined as:

method circle(
       :$index, :center(:$at), :$radius!,
       TrueOnly :$front, TrueOnly :$back, TrueOnly :$behind, Bool :$clip, :$fillcolor, :$fillstyle,
       TrueOnly :$default, :$linewidth, :$dashtype, :&writer? = -> $msg { self.command: $msg }
)

Defines a single circle which will appear in all subsequent 2D plot.

polygon

Defined as:

method polygon(
       :$index, :$from, :@to,
       TrueOnly :$front, TrueOnly :$back, TrueOnly :$behind, Bool :$clip, :$fillcolor, :$fillstyle,
       TrueOnly :$default, :$linewidth, :$dashtype, :&writer? = -> $msg { self.command: $msg }
)

Defines a single polygon which will appear in all subsequent 2D plot.

title

Defined as:

method title(
       Str :$text, :$offset, :$font-name, :$font-size, :tc(:$textcolor), :$colorspec, Bool :$enhanced,
       :&writer? = -> $msg { self.command: $msg }
)

Produces a plot title that is centered at the top of the plot.

arrow

Defined as:

multi method arrow(
      :$tag, :$from, :$to, Bool :$head, TrueOnly :$backhead, TrueOnly :$heads,
      :$head-length, :$head-angle, :$back-angle,
      Bool :$filled, TrueOnly :$empty, TrueOnly :$border,
      TrueOnly :$front, TrueOnly :$back,
      :ls(:$linestyle), :lt(:$linetype), :lw(:$linewidth), :lc(:$linecolor), :dt(:$dashtype), :&writer? = -> $msg { self.command: $msg }
)

Places an arrow on a plot.

multiplot

Defined as:

multi method arrow(
      :$tag, :$from, :$rto, Bool :$head, TrueOnly :$backhead, TrueOnly :$heads,
      :$head-length, :$head-angle, :$back-angle,
      Bool :$filled, TrueOnly :$empty, TrueOnly :$border,
      TrueOnly :$front, TrueOnly :$back,
      :ls(:$linestyle), :lt(:$linetype), :lw(:$linewidth), :lc(:$linecolor), :dt(:$dashtype), :&writer? = -> $msg { self.command: $msg }
)

Places gnuplot in the multiplot mode, in which several plots are placed next to each other on the same page or screen window.

command

Defined as:

method command(Str $command)

Runs a given $command. If there are no appropriate interfaces, this method will be a good alternative.

EXAMPLES

3D surface from a grid (matrix) of Z values

SOURCE

use Chart::Gnuplot;

my $gnu = Chart::Gnuplot.new(:terminal("png"), :filename("surface.dem.00.png"));
$gnu.title(:text("3D surface from a grid (matrix) of Z values"));
$gnu.xrange(:min(-0.5), :max(4.5));
$gnu.yrange(:min(-0.5), :max(4.5));
$gnu.grid;
$gnu.command("set hidden3d");

my @grid = (q:to/EOF/).split("\n", :skip-empty)>>.split(" ", :skip-empty);
5 4 3 1 0
2 2 0 0 1
0 0 0 1 0
0 0 0 2 3
0 1 2 4 3
EOF

$gnu.splot(:vertices(@grid), :style("lines"), :title(False), :matrix);
$gnu.dispose;

OUTPUT

3D surface from a grid (matrix) of Z values

sin(x)

SOURCE

use Chart::Gnuplot;

my $gnu = Chart::Gnuplot.new(:terminal("png"), :filename("sinx.png"));
$gnu.title(:text("sin(x) curve"));
$gnu.plot(:function('sin(x)'));
$gnu.dispose;

OUTPUT

sin(x)

Recall-Precision Curve

SOURCE

use v6;
use Chart::Gnuplot;

my $gnu = Chart::Gnuplot.new(:terminal("png"), :filename("recprec.png"));
$gnu.title(:text("Recall-Precision Curve"));
$gnu.ylabel(:label("Precision"));
$gnu.xlabel(:label("Recall"));
$gnu.xrange(:min(0.0), :max(1.0));
$gnu.yrange(:min(0.0), :max(1.0));

my @methodA = (q:to/EOF/).split("\n", :skip-empty)>>.split(" ", :skip-empty);
0.0 1.0
0.1 0.95
0.2 0.9
0.3 0.85
0.4 0.82
0.5 0.6
0.6 0.55
0.7 0.51
0.8 0.4
0.9 0.38
1.0 0.35
EOF

my @methodB = (q:to/EOF/).split("\n", :skip-empty)>>.split(" ", :skip-empty);
0.0 1.0
0.1 0.95
0.2 0.8
0.3 0.5
0.4 0.4
0.5 0.3
0.6 0.2
0.7 0.1
0.8 0.08
0.9 0.05
1.0 0.05
EOF

my %methodA = %(:vertices(@methodA), :style("linespoints"), :title("proposed"), :lc(qw/rgb "green"/), :pt(10));
my %methodB = %(:vertices(@methodB), :style("linespoints"), :title("baseline"), :lc(qw/rgb "red"/), :pt(13));

$gnu.plot(|%methodA);
$gnu.plot(|%methodB);
$gnu.dispose;

OUTPUT

recall precision curve

How to use Chart::Gnuplot on jupyter?

One way to do this is:

    1. Write a svg image as a tmp file.
    1. Read this tmp file and remove the first superfluous line.

If you haven't setup Raku kernel yet, use Jupyter::Kernel.

SOURCE

use Chart::Gnuplot;
use Chart::Gnuplot::Subset;
use File::Temp;

my ($filename, $filehandle);

# NOTE: Shouldn't remove both ENTER and LEAVE blocks. File::Temp's auto-unlink doesn't seem to work on jupyter.
ENTER {
  ($filename, $filehandle) = tempfile(:tempdir("/tmp"), :suffix(".svg"));
}

LEAVE {
  $filehandle.close;
  $filename.IO.unlink;
}

my $gnu = Chart::Gnuplot.new(:terminal("svg"), :filename($filename));

my @data = (q:to/EOF/).split("\n", :skip-empty)>>.split(" ", :skip-empty);
Year Male Female
1950 100 90
1960 100 90
1970 80 70
1980 130 140
1990 140 120
2000 200 210
2010 240 230
2020 400 420
EOF

my ($header, *@body) = @data;

$gnu.command("set style histogram clustered");
$gnu.legend(:left);
my AnyTicsTic @tics = (@body>>.[0]).pairs.map(-> (:key($pos), :value($year)) { %(:label($year), :pos($pos)) });
$gnu.xtics(:tics(@tics));
$gnu.xlabel(:label($header[0]));
$gnu.plot(:vertices(@body), :using([2]), :style("histogram"), :title($header[1]), :fill("solid 1.0"));
$gnu.plot(:vertices(@body), :using([3]), :style("histogram"), :title($header[2]), :fill("solid 1.0"));
$gnu.dispose;

$filehandle.lines[1..*].join("\n");

The example ipynb file is here: /notebooks/synopsis.ipynb.

AUTHOR

titsuki [email protected]

COPYRIGHT AND LICENSE

Copyright 2017 titsuki

This library is free software; you can redistribute it and/or modify it under the GNU General Public License version 3.0.