The syntax is
plot x lc rgb "black", x/2 lc rgb "red"
You missed the "lc" specifier.
Am 21.02.2024 um 14:21 schrieb db:
Here is a mini example
gnuplot << eoi
set term postscript enh color eps 24
set output 'mini.eps'
set xlabel "x"
plot x w p pt 7 rgb 'black', \
x/2 w p pt 7 rgb 'red'
quit
eoi
gv mini.eps
This baulks at the first "rgb":
gnuplot> plot x w p pt 7 rgb 'black', x/2 w p pt 7 rgb 'red'
^
line 0: unexpected or unrecognized token: rgb
But if I leave out the second plot line (and terminate
the first properly (no ", \)) it gives me a plot of
a lot of blue points.
Why can't I have several coloured plots?
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