CODEWITHSUNDEEP
functionmatlabsignals
Shnkc
Shnkc

Reputation: 2158

Mistake in a matlab function which I couldn't identify

I am newbie in matlab and writing a function code with the aim of helping to plot of half-wave rectified sine function. But it doesn't give me the result what I expect.

function x = rectifiedSineWave(t )
if sin(t) < 0
    x = 0;
else
    x = sin(t);
end

Upvotes: 1

Views: 549

Answers (1)

Jonas Heidelberg
Jonas Heidelberg

Reputation: 5024

If t has just one element, your original code looks fine.

If t is a vector, you probably want

function x = rectifiedSineWave(t)
  x = sin(t);
  x(x<0)=0;

or, even simpler (thanks to Serg)

function x = rectifiedSineWave(t)
  x = max(0, sin(t));

This way elements where sin(t) is negative are set to zero.

Your problem was that if sin(t)<0 triggers as soon as any element of the vector t is negative, and will set x to zero.

Upvotes: 4

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