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BQN-Gnuplot

A BQN wrapper script for Gnuplot on linux. Tested on CBQN.

Usage:

Import:

⟨Gnuplot⟩ ← •Import "Gnuplot.bqn"

Create a plot window:

plt ← Gnuplot @

When creating a plot you can include 'set' options as either a list of strings or a single string:

plt ← Gnuplot ⟨
  "title 'Title'" # use '' instead of "" when needed
  .
  .
  .
⟩

plt ← Gnuplot "
  terminal pngcairo
  output 'output.png'
  .
  .
  .
"

Additional plot options can be given with .Set and .Unset:

plt.Set "
  xlabel 'x'
  ylabel 'f(x)'
"

plt.Unset "
  key
"

Data is expect as a flat, rank 1 or 2 array, with major cells corresponding to lines in gnuplot's data format:

data1 ← >⟨  # points in major cells
  0‿5
  1‿6
  2‿7
  3‿8
⟩  

data2 ← 8‿7‿6‿5

data3 ← >⟨
  1‿2‿3‿4
  1‿3‿5‿7
  1‿4‿7‿10
  1‿5‿9‿13
⟩

Use .Plot (or .SPlot for 3d plot types) to plot the data, giving options as a joined string:

plt.Plot data1‿"with lines"
plt.Plot data2             

plt.SPlot data3‿"matrix with lines"

Data can also contain strings for uses such as labeling bar charts:

stringdata ← >⟨
    "label A"‿3
    "label B"‿7
    "label C"‿5
⟩
plt.Set ⟨"boxwidth 0.5","style fill solid"⟩
plt.Plot stringdata‿"using 2:xtic(1) with boxes"

Additionally, functions in strings can be passed to gnuplot to evaluate:

plt.Plot "sin(x)"‿"with impulse"

Finally, to show the plot:

plt.Show @

To use Gnuplot's Multiplot features make sure multiplot is set when creating the window:

mplt ← Gnuplot "
  multiplot layout 2,1 title 'Multiple plots' font ',20'
"

Plot the contents of the first subplot:

mplt.Set "title 'Subplot 1'"

mplt.Plot "x**2/10"
mplt.Plot "cos(x)"‿"with points"

Then use .Subplot to begin the next plot, after which you can set and unset options specific to that plot.

mplt.Subplot "title 'Sub-plot 2'"

mplt.Set "title 'Subplot 2'"
mplt.Unset "key"

mplt.SPlot "x*y"