Consider the following dataset (1.dat), 1 0.8 0 2 0.6 0 3 0.9 1 4 1.1 0 5 0.7 0 6 0.6 1 where we want to plot the first two columns only when the third one equals zero. Then you can try this: plot ‘1.dat’ using 1:($3==0?$2:1/0) (Credit to markjoe on Gnuplot mailing-list.)
It’s definitely possible and your datafile is already the correct format. The functionality you’re looking for is built into columnheader(N) which reads the data at the top of the N’th column and uses it as the plot title: plot ‘test.dat’ i 0 u 1:2 w lines title columnheader(1),\ ‘test.dat’ i 1 u 1:2 w lines … Read more
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.
Actually, set size ratio -1 set the same ratio in all direction independently of the window while set size square plot in a square box, no matter what range you use.
All format specifiers that gnuplot has to offer can be found here. If you don’t like the 2e+07 format you could try setting the format with set format x “%.0s*10^{%T}” which gives you a format like 15*10^6.
To minimise my effort, I tend to use package managers to install command line tools as much as possible. For OS X I recommend using homebrew. Installing gnuplot with homebrew is as easy as typing: brew install gnuplot
To accomplish this you should use the notitle tag. plot “delay_try1.dat” using 1:2 title ‘With CloneScale’ with lines, “normal_2.dat” using 1:2 title “Without CloneScale” with lines lc rgb “black”, “normal2.dat” using 1:2 with lines lc rgb “black” notitle or a more general example; plot ‘File.dat’ using 1:2 notitle an alternative that is equivalent to notitle … Read more
You can have the axes handled automatically without you having to scale them yourself and keep auto-scaling: set terminal jpeg set output ‘graph.jpg’ set xrange [-10:10] set ytics 10 nomirror tc lt 1 set ylabel ‘2*x’ tc lt 1 set y2tics 20 nomirror tc lt 2 set y2label ‘4*x’ tc lt 2 plot 2*x linetype … Read more
You can use the syntax for inline data – filename ‘-‘. The following example produces a simple plot in a GIF image (bash script): gnuplot << EOF set terminal gif set output ‘plot1.gif’ plot ‘-‘ using 1:2 1 10 2 20 3 32 4 40 5 50 e EOF
I think you are on the right track with gnuplot. For what you want, it’s very powerful and flexible. However, you may want to consider writing to gnuplot directly from your application instead of creating data and feeding it. There is an ANSI C API to gnuplot available.