Re: [Gnuplot-info] sum

[theozh <th...@gm...>]

maybe something like this...?

mySum(xmin,xmax,N) = sum[i=0:N-1] (x0=xmin+real(xmax-xmin)/(N-1)*i,f(x0))

f(x) = x
print mySum(1,100,100)

f(x) = x**2
print mySum(-10,10,2001)

Results: 5050.0 and 66766.7

You need real() to avoid gnuplot's integer division.
Alternatively, you have to ensure that xmin or xmax are floating point numbers.

Am 01.11.2022 um 20:55 schrieb Patrick Dupre:
> set samples 2001
>
> f(x)= ..
>
> I wish to get the sum of f(x) from [-10:10]
>