I'm trying to make a function and my if statement isn't working properly

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Shaung
Shaung 2022-1-28
编辑： Stephen23 2022-1-28
Hello,
I'm trying to make a function to create unit steps. I think I have it almost working but for some reason it wont execute the if statement that is inside my for loop. It goes straight to the else statement and executes y = 0 across the time values when I plot them. I'm trying to find out why it wont go to one when a >= mu. I've been looking on the internet to find something but I cant seem to. Thanks.
function y = my_unit_step(t,mu)
a = t;
y = length(a); % y outputs same size as t
for i = 1:length(a)
if a >= mu
y(i)=1;
else
y(i)=0;
end
end
plot (t,y)

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Stephen23
Stephen23 2022-1-28
编辑：Stephen23 2022-1-28
Assuming that mu is scalar:
if a(i) >= mu
% ^^^ you need this indexing
Note that the MATLAB approach would be to get rid of the loop entirely, e.g.:
y = double(a>=mu);

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