CODEWITHSUNDEEP
gnuplothistogram
Maheen Siddiqui
Maheen Siddiqui

Reputation: 185

Gnuplot histogram

I have created a histogram for some data that I have in a .dat file using the 

binwidth=...
bin(x,width)=width*floor(x/width)

plot 'file' using (bin($1,binwidth) + binwidth/2):(1.0) smooth freq with boxes

but because my file has over 1,000,000 entries that it reads from and puts into different bins, I don't know the exact frequency/density of each bin is. I would like to know the frequency or have it write the frequency to a file possibly, does anyone know if its possible? I was also wondering whether instead of frequency it was possible to plot percentage on the y-axis so example if my frequency is 50,000 and my total number is 1,000,000 then on the y-axis to have a percentage instead of the actual frequency?

Thank you

Upvotes: 2

Views: 3176

Answers (1)

Christoph
Christoph

Reputation: 48390

You can use the stats command to get the number of entries.

stats 'file'
binwidth=...
bin(x,width)=width*floor(x/width)

plot 'file' using (bin($1,binwidth) + binwidth/2):(1.0/STATS_records) smooth freq with boxes

To plot the percentage use

plot 'file' using (bin($1,binwidth) + binwidth/2):(100.0/STATS_records) smooth freq with boxes

Upvotes: 7

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