Question

I am new to gnuplot, and am trying to create a stacked histogram for a project. The problem I am running into is, that I am not able to put ticlabels on the x-axis (even if I could, they are not getting formatted in a neat way). My gp file is as follows:

Here is a snapshot of my data file:

CC P1-X P1-Y P2-X P2-Y
1 0.1097586  0.3262812  1.980848  5.9098402
2 0.1010986  0.2988812  0.9966702  5.8378412
3 0.4017474  0.7559452  4.41813  11.7404132
4 0.1028442  0.2974772  1.418744  6.0554552
5 0.1097316  0.3216112  1.967492  5.8007364
6 0.954794  0.3004874  0.9568386  5.778537

And here is my gp file:

set title "GCC compilation option by average execution time as stacked histogram"
set terminal jpeg medium
set output "histosmalldata.jpeg"
set boxwidth 0.9 absolute
set style fill solid 1.00 border -1
set key autotitle columnheader
set key outside right top vertical Left reverse enhanced autotitles columnhead nobox
set key invert samplen 4 spacing 1 width 0 height 0 
set style histogram rowstacked title  offset character 0, 0, 0
set style data histograms
set xtics border in scale 1,0.5 nomirror rotate by -45  offset character 0, 0, 0
set xtics norangelimit
set xtics ("O2-ffast-math-finline-functions" 1, "O2-funroll-loops-march=barcelona-ffast-math-finline-functions" 2, "GCCFLAGS_O0" 3, "O2-ftree-vectorize-funroll-loops-march=barcelona" 4, "GCCFLAGS_O2" 5, "O2-ftree-vectorize-funroll-loops-ffast-math" 6)
set xtics 1,6 nomirror 
set ytics 0,100 nomirror
set ytics 1
set yrange [0:20]
set ylabel "Time"
set xlabel "GCC Compiler Options"
plot 'smalldata' using 2:xtic(1) ti col, '' using 3 ti col, '' using 4 ti col, '' using 5 ti col

This is the image of the graph:

Now, in the x axis, I am having 1,2,3 – 6 which I don’t want, instead, I would want “O2-ffast-math-finline-functions” for 1 and so on in a neat formatted way.

I wrote this script after consulting some examples from gnuplot page and do not have a good understanding of some of the verbs, so apart from the solution, any general comments are welcome.

Thank you,
Sayan

Answer 1

You should not overwrite your xtics settings after you specified what you want.

Put all options into a single set command:

set xtics border in scale 1,0.5 nomirror rotate by -45  offset character 0, 0, 0\
         norangelimit\
         ("O2-ffast-math-finline-functions" 1,\
          "O2-funroll-loops-march=barcelona-ffast-math-finline-functions" 2,\
          "GCCFLAGS_O0" 3, "O2-ftree-vectorize-funroll-loops-march=barcelona" 4,\
          "GCCFLAGS_O2" 5, "O2-ftree-vectorize-funroll-loops-ffast-math" 6)

Note that you can escape the newline with a backslash as the last character of the line.