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;; interface to gnuplot
;; See example calls below (gptest, gphist-test)
variable *gp-outf*, *gp-data*, *gp-xlabel*, *gp-ylabel*, *gp-driver*,
*gp-output*, *gp-command*, *gp-curve*, *gp-sep*, *gp-title*,
*gp-style*, *label*, *gpx*, *gpy*, *gp-fontspec* = "",
*gp-xtics-fontspec*, *gp-ytics-fontspec*
function gp-init(filename, driver: "aqua", output: nil, xlabel: nil,
ylabel: nil, title: nil , style: nil, xrange: nil, yrange: nil,
fontsize: nil, xticsize: nil, yticsize: nil)
begin
set *gp-outf* = open(filename, direction: :output),
*gp-data* = nil,
*gp-xlabel* = xlabel,
*gp-ylabel* = ylabel,
*gp-driver* = driver,
*gp-command* = "plot",
*gp-sep* = "",
*gp-output* = output,
*gp-title* = title,
*gp-style* = style
if xrange then
set xrange = format(nil, " [~A:~A]", first(xrange), second(xrange))
else set xrange = ""
if yrange then
begin
if string=(xrange, "") then set xrange = " []"
set yrange = format(nil, " [~A:~A]", first(yrange), second(yrange))
end
else set yrange = ""
if fontsize then
set *gp-fontspec* = format(nil, " font \",~A\"", fontsize)
;; NOTE: In my gnu-plot, "Times-Roman,24" works, but ",24" does not.
if xticsize then
set *gp-xtics-fontspec* = format(nil, "Times-Roman,~A", xticsize)
if yticsize then
set *gp-ytics-fontspec* = format(nil, "Times-Roman,~A", yticsize)
set *gp-command* = strcat("plot", xrange, yrange)
end
function gp-newcurve(title: "", color: nil , label: nil , x: nil , y: nil )
begin
set *label* = label
set *gpx* = x
set *gpy* = y
if *label* then
begin
exec format(*gp-outf*, "set label \"~A\"", *label*)
exec format(*gp-outf*, " ")
exec format(*gp-outf*, "at ~A", *gpx*)
exec format(*gp-outf*, " , ")
exec format(*gp-outf*, "~A~%", *gpy*)
end
set *gp-curve* = nil
if *gp-style* = :histogram then
set *gp-command* = strcat(*gp-command*, *gp-sep*, " '-' w boxes title \"",
title, "\" lt -1")
else if *gp-style* = :scatter then
set *gp-command* = strcat(*gp-command*, *gp-sep*, " '-' title \"",
title, "\"")
else
set *gp-command* = strcat(*gp-command*, *gp-sep*, " '-' w l title \"",
title, "\"")
set *gp-sep* = ","
if color then
set *gp-command* = strcat(*gp-command* ," lc rgbcolor \"", color, "\"")
end
function gp-point(x, y)
set *gp-curve* @= list(x, y)
function gp-label(text, x, y)
exec format(*gp-outf*, "set label \"~A\" at ~A,~A~%", text, x, y)
function gp-endcurve()
begin
;display "gp-endcurve", *gp-curve*, *gp-data*
set *gp-curve* = reverse(*gp-curve*),
*gp-data* @= *gp-curve*
end
function gp-endplot()
begin
set *gp-data* = reverse(*gp-data*)
exec format(*gp-outf*, "set term ~A~A~%", *gp-driver*, *gp-fontspec*)
if *gp-output* then
exec format(*gp-outf*, "set output \"~A\"~%", *gp-output*)
if *gp-xlabel* then
exec format(*gp-outf*, "set xlabel \"~A\"~%", *gp-xlabel*)
if *gp-ylabel* then
exec format(*gp-outf*, "set ylabel \"~A\"~%", *gp-ylabel*)
if *gp-xtics-fontspec* then
exec format(*gp-outf*, "set xtics font \"~A\"~%", *gp-xtics-fontspec*)
if *gp-ytics-fontspec* then
exec format(*gp-outf*, "set ytics font \"~A\"~%", *gp-ytics-fontspec*)
if *gp-title* then
exec format(*gp-outf*, "set title \"~A\"~%", *gp-title*)
if *gp-style* = :histogram then
begin
exec format(*gp-outf*, "set style data histograms ~%" )
exec format(*gp-outf*, "set style fill solid 0.2 border -1 ~%" )
end
exec format(*gp-outf*, "~A~%", *gp-command*)
loop
for curve in *gp-data*
loop
for pair in curve
exec format(*gp-outf*, "~A ~A~%", first(pair), second(pair))
end
exec format(*gp-outf*, "e~%")
end
exec close(*gp-outf*)
end
;; gptest -- exercise some features
function gptest()
begin
exec gp-init("testplot.txt", xlabel: "Time", ylabel: "Tempo",
title: "This Is a Test", fontsize: 12)
exec gp-newcurve(title: "curve-1", color: "black" )
loop
for i from 0 below 50
exec gp-point(i, 90 + real-random(-4, 4) + 10 * sin(i / 30.0))
end
exec gp-endcurve()
exec gp-newcurve(title: "smooth" , label: "test label" , x: 30 , y: 90 ) ; default color
loop
for i from 0 below 50
exec gp-point(i, 90 + 10 * sin(i / 30.0))
end
exec gp-endcurve()
exec gp-label("Random Label", 5, 102)
exec gp-endplot()
end
;; gphist-test -- exercise some features and make a histogram
function gphist-test()
begin
exec gp-init("testhist.txt", xlabel: "delta", ylabel: "N",
title: "This Is a Histogram Example", style: :histogram,
; note: bars are "fat", so increase the range to avoid clipping
xrange: {-10.5 10.5},
yrange: {0 1.5})
exec gp-newcurve()
loop
for i from -10 to 10
exec gp-point(i, cos(i / 10.0) + 0.13)
end
exec gp-endcurve()
exec gp-endplot()
end
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