Plotting a function that performs a sum.

I defined a function that computes a specific sum and now I want to plot it over x where 0<x<1. I am getting an error saying incompatible sizes and am not sure how to fix it.

f = @(x,y,z) sum(sin((3:15).*sqrt(x*y))+z);

x = linspace(0,1,10);

y = 0.5;

z = 0.1;

plot(x,f(x,y,z))

[Joe Vinciguerra]

You have two arrays in the function of different sizes that you are trying to compute together, namely "x" and [3:15]. They need to be the same size for your function to work. How you resolve that depends on your intent.

Answer 1

[Torsten]

f = @(x,y,z) sum(sin((3:15).*sqrt(x*y))+z);
x = linspace(0,1,100);
y = 0.5;
z = 0.1;
plot(x,arrayfun(@(x)f(x,y,z),x))

But is it really correct to have the constant value z within the sum ?

[Benjamin Collier]

I guess it doesnt need to be it was just part of the question.