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gnuplot

Set a different seed for each run

I have a plot of a function that uses rand(0) to generate numbers between 0 and 1.

I would like to set a different random sequence each time I run the Gnuplot script. The documentation says to uses rand(x) where x is a positive integer.

I have tried this

rand(floor(10*acos(rand(0))))

that gives an integer for each execution. However, this line gives me an error. I have not found any example of setting the seed of rand.

How can I set a different seed each time to get different plots?

Regards

Solution

  • If you want seemingly different set of random numbers each time gnuplot starts up you can seed the random number generator with the time(0) function. Use:

    rand(time(0))

    the first time to get it going. Then just use rand(0) for the rest in your script.