comparison of loop and vectorization in matlab

Question

let us consider following code for impulse function

function y=impulse_function(n);
y=0;
if n==0
    y=1;
end
end

this code

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Answer 1

Your function is not defined to handle vector input.

Modify your impluse function as follows:

function y=impulse_function(n)
    [a b]=size(n);
    y=zeros(a,b);
    y(n==0)=1;
end

In your definition of impulse_function, whole array is compared to zero and return value is only a single number instead of a vector.