Error when using Max command in a function

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When creating a function that performs a Monte-Carlo simulation I have to find the maximum value in an array, but when I try this I get an error code that says: Error using max Invalid data type. First argument must be numeric or logical.
Here is my function:
function [ integral_approx ] = montecarlosim( a,b,y,n )
x=[a,b];
r=max(y);
v=(max(x)-min(x)).*rand(n,1)+min(x);
w=(r).*rand(n,1);
x=v;
i=find((w>=0)&(w<=y));
m=numel(i);
(m/n)*r*(b-a)
end
  2 Comments
James Tursa
James Tursa on 4 Sep 2017
How are you calling this function? What are the data types and sizes of the variables?

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Accepted Answer

Wonsang You
Wonsang You on 4 Sep 2017
Edited: Wonsang You on 4 Sep 2017
Your function has no logical problem. Please make sure your argument y should be a numerical vector not logical.

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