Display and save plot simultaneously in maxima

Question

Currently, I can display the plot in maxima as follows:

f(x) := sin(x)$
g(x) := cos(x)$

plot2d([f(x), g(x)], [x,-5,5],[legend,"sin(x)","cos(x)"],
[xlabel,"x"],[ylabel,"y"],
[gnuplot_preamble,"set key box spacing 1.3 top right"])$

And save the plots with the command:

plot2d([f(x), g(x)], [x,-5,5],[legend,"sin(x)","cos(x)"],
[xlabel,"x"],[ylabel,"y"],
[pdf_file,"./trigplot.pdf"],
[gnuplot_preamble,"set key box spacing 1.3 top right"]
)$

How to display and save the plot in maxima simultaneously?

slitvinov · Accepted Answer · 2018-12-12 13:23:26Z

0

p2 takes a file name and the same arguments as plot2d.

p2(file, [L])::=buildq([file, L],
  (plot2d(splice(L)),
   plot2d(splice(L), ['pdf_file, file])))$

f(x) := sin(x)$
g(x) := cos(x)$
p2("trigplot.pdf",
  [f(x), g(x)], [x,-5,5],
  [legend,"sin(x)","cos(x)"], 
  [xlabel,"x"],[ylabel,"y"],
  [gnuplot_preamble,"set key box spacing 1.3 top right"]);

It is a macro. First it substitutes file and L. splice(L)` is converted to an argument list. After the substitution the resulting expression is evaluated in the context of the caller.

You can use macroexpand to see the expression after substitution.

(%i1) a: 42 $
(%i2) macroexpand(p2(file, a, b));
(%o2)           (plot2d(a, b), plot2d(a, b, ['pdf_file, file]))

edited Dec 12, 2018 at 13:23

answered Dec 5, 2018 at 23:22

slitvinov

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1 Comment

ASarkar Over a year ago

Only changed the filename to "./trigplot.pdf" to save the plot in the current directory.

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