Plotting With Gnuplot
For a blast from the past here is a quick tutorial on how to plot with Gnuplot. Most plotting I do uses either an Excel spreadsheet, or Tableau, or something along those lines. However on linux I use Open Office as my spreadsheet, and getting a copy of the chart as an image file is cumbersome. So I am reverting to Gnuplot.
Lets say you have a data file that looks like this. This was created via a simple cut-n-paste of data from the spreadsheet which I have saved in file bm1.dat.
#Threads Orders_Per_Minute Orders_Per_Thread_Per_Minute 1.0 5900.0 5900.0 5.0 15500.0 3100.0 10.0 29000.0 2900.0 20.0 55000.0 2750.0 50.0 98000.0 1960.0 75.0 101000.0 1346.7
To produce a gif image run gnuplot and do the following.
gnuplot> set xlabel "Total Threads" gnuplot> set ylabel "Transactions / Minute" gnuplot> set terminal gif size 500,400 Terminal type set to 'gif' Options are 'nocrop font /usr/share/fonts/truetype/ttf-liberation/LiberationSans-Regular.ttf 12 size 500,400 ' gnuplot> set output 'bm1.gif' gnuplot> plot 'bm1.dat' using 1:2 ti "Total Thruput" with linespoints gnuplot>
Now you will have an output file bm1.gif which looks just like the one below.
Now I might want to plot the second column, throughput per thread, in a different chart. This is done as follows
gnuplot> set output 'bm1a.gif' gnuplot> plot 'bm1.dat' using 1:3 ti "Thruput Per Thread" with linespoints gnuplot>
This produces the following chart.
For much more detailed information on using gnuplot click here.