Gnuplot chart for a histogram with error bars
#!/usr/bin/gnuplot | |
# Output format | |
set terminal png enhanced font "freesans,16" linewidth 2 | |
# Caption | |
set key inside top horizontal nobox font ",12" | |
set xlabel '' | |
set ylabel '' | |
set auto x | |
set xtics rotate by -30 offset -1 | |
set style data histogram | |
set style fill solid border -1 | |
set style histogram errorbars gap 1 lw 1 | |
set datafile separator ";" | |
set yrange [0.4:1.4] | |
set style line 1 lt 2 | |
set style line 2 lt 3 | |
set style line 3 lt 4 | |
# Compute error of a/b | |
# 1. compute relative errors | |
# 2. add them together | |
# 3. convert the result back to absolute (multiply by a/b) | |
error(a,aerr,b,berr) = ((aerr/a) + (berr/b)) * (a/b) | |
set title 'Title' | |
set output 'output.png' | |
# Note: 'every ::3' starts counting from row 3 onwards, when there is more than | |
# one heading row | |
plot 'input.dat' every ::3 using ($2/$3):(error($2,$6,$3,$7)):xtic(1) ls 1 ti 'compute', \ | |
'' every ::3 using ($5/$3):(error($5,$9,$2,$7)):xtic(1) ls 2 ti 'prefetch', \ | |
'' every ::3 using ($4/$3):(error($4,$8,$2,$7)):xtic(1) ls 3 ti 'fetch' | |
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