Choosing line type and color in Gnuplot 4 0

Question

I have two pairs of datasets  which I need to plot using Gnuplot   I want the first pair to be plotted in red  one solid and one dashed  The second pair  I want to plot in blue  one solid and one dashed   I ve experimented with set style line several times  but I cannot get this exact behaviour  My last attempt  attached  plots the first pair in red  solid  and the second pair in blue  dotted    Any help will be greatly appreciated   set style line 1 lt 1 lw 3 pt 3 set style line 2 lt 1 lw 3 pt 3 set style line 3 lt 3 lw 3 pt 3 set style line 4 lt 3 lw 3 pt 3 plot  data1 dat  using 1 3 w l ls 1         data1 dat  using 1 4 w l ls 2         data2 dat  using 1 3 w l ls 3         data2 dat  using 1 4 w l ls 4

User · Answer

You need to use linecolor instead of lc  like   set style line 1 lt 1 lw 3 pt 3 linecolor rgb  red    help set style line  gives you more info

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You can also set the  dashed  option when setting your terminal  for instance   set term pdf dashed

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I ve ran into this topic  because i was struggling with dashed lines too  gnuplot 4 6 patchlevel 0    If you use   set termoption dashed   Your posted code will work accordingly   Related question  However  if I want to export a png with  set terminal png  this isn t working anymore  Anyone got a clue why   Turns out  out  gnuplots png export library doesnt support this  Possbile solutions    one can simply export to ps  then convert it with pstopng according to  christoph  if you use pngcairo as your terminal  set terminal pngcairo  it will work

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Here is the syntax     set terminal pdf  monochrome color colour                       no enhanced                      fname   lt font gt     fsize  lt fontsize gt                       font   lt fontname gt    lt fontsize gt                         linewidth  lt lw gt    rounded butt                      solid dashed   dl  lt dashlength gt                        size  lt XX gt  unit   lt YY gt  unit     and an example   set terminal pdfcairo monochrome enhanced font  Times-New-Roman 12  dashed

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I know the question is old but I found this very helpful http   www gnuplot info demo canvas dashcolor html   So you can choose linetype and linecolor separately but you have to precede everything by  set termoption dash   worked for me in gnuplot 4 4

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You might want to look at the Pyxplot plotting package http   pyxplot org uk which has very similar syntax to gnuplot  but with the rough edges cleaned up  It handles colors and line styles quite neatly  and homogeneously between x11 and eps pdf terminals   The Pyxplot script for what you want to do above would be   set style 1 lt 1 lw 3 color red set style 2 lt 1 lw 3 color blue set style 3 lt 2 lw 3 color red set style 4 lt 2 lw 3 color blue plot  data1 dat  using 1 3 w l style 1      data1 dat  using 1 4 w l style 2      data2 dat  using 1 3 w l style 3      data2 dat  using 1 4 w l style 4

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Edit  Sorry  this won t work for you  I just remembered the line color thing is in 4 2  I ran into this problem in the past and my fix was to upgrade gnuplot    You can control the color with set style line as well   lt 3  will give you a dashed line while  lt 1  will give you a solid line  To add color  you can use  lc rgb  color    This should do what you need    set style line 1 lt 1 lw 3 pt 3 lc rgb  red  set style line 2 lt 3 lw 3 pt 3 lc rgb  red  set style line 3 lt 1 lw 3 pt 3 lc rgb  blue  set style line 4 lt 3 lw 3 pt 3 lc rgb  blue

[gnuplot] Choosing line type and color in Gnuplot 4.0

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