Re: [Gnuplot-info] Gnuplot Summed y Values over an Interval

[Leo B. <l_b...@us...>]

>   Date: Sat, 30 Nov 2013 09:28:09 -0800
>   From: Vesnog <ong...@gm...>
>
>   Greetings, 
>
>   My purpose is to plot x vs. summed y values over a certain x interval. How
>   can I do so? Later I will calculate the mean, variance and median of the
>   data from this plot. I think it should be possible in Gnuplot someway. Any
>   help and suggestion is welcome and appreciated. 

How about:

total=0; ssq=0; sum=0;
stat(y) = (total=total+1, ssq=y**2+ssq, sum=y+sum);
mean(x) = sum/(1.0*total);
mlvar(x) = ssq/(1.0*total) - mean(1)**2;

plot [0:5] '-' using 1:(stat($2)) notitle
0 0
1 1
2 2
3 3
4 4
e

The plot command loops over the data set, and stat computes the total
number of data points, and running sum and sum of squares; it returns
the running sum.

mean and mlvar do what they say they do.

Leo

>
>   P.S: I have a RNG and the random numbers generated are given as an argument
>   to Gaussian PDF, my aim is to find the mean, variance and median from this
>   accumulated data.