Dear all, I can't wrap my head around this. Mathematically it's not hard, I just don't know how to store and access it without many loops. I have a function f(x,y). I would like to calculate it at x = arange(20,101,20) and y = arange(2,30,2) How do I store that in a multi-dimensional array and preserve the grid points where I did the calculation so that I could plot later groups of function plots like this: for elem in y-values plot(x_values, f(x,y=elem) or for elem in x-values: plot(y_values, f(x=elem,y) I can smell that the solution can not be so hard, but I currently understand how to keep the points where I did the evaluation of the function. Maybe it is also imaginable to do something with functional tricks as 'map'? Thanks for any suggestions! Best regards, Michael