Plotting a function defined by an integral

[cdecastro]

(12-19-2013 05:01 PM)Tim Wessman Wrote:  F1(X)=f1 will not work. You have no 'X' variable to work with. I am guessing trying F1(X)=approx(f1(X)) will work fine.

Without that approx, you are getting symbolic objects out and it has no number to work with except in places where it evaluates down to a real whole number.

When I assign:
f1:=(d)->int(x^2,x,0,d);
F1:=f1;

the graph will plot; It just takes a long time. Obviously it is much faster if I make the graphing window narrower. I'll give your suggestion a try. Thanks for the reply.