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Topic: Question on a function with changing sign
Replies: 2   Last Post: Jan 20, 2014 9:25 AM

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Posts: 1
Registered: 1/19/14
Question on a function with changing sign
Posted: Jan 19, 2014 11:45 PM
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I am a newbie on MATLAB and start learning it now. I was told that it takes less time on using vector operation than loops. Here is my function,

zi = (-1)^i * x^2

I can do the following:
z = x.^2
but I am wondering how to do this to get the (-1)^i without using a loop.
(for using a loop, that would be easy but I want to try something new.)

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