Doubt on fft function

x=[1 2 6] x=fft(x) x =

   9.0000            -3.0000 + 3.4641i  -3.0000 - 3.4641i
x=x>-3
x= 1 0 0.

why this is coming as binary ?can this idea could be used as a binary coder? Expecting your kind reply.Thank you.

Answer 1

[Walter Roberson]

It isn't coming out as binary: it is coming out as logical, as you have assigned the result of the comparison to the variable "x".

If you are trying to extract the elements that are greater than -3 then

x(x>-3)

Please be careful about using comparison operations with complex data.

[Pooja]

Sir,from where we get solutions to these type of problems.From any matlab books?

[Image Analyst]

There's a very nice list of "Answers" that you'll want to review here: http://www.mathworks.com/matlabcentral/answers/?search_submit=answers&query=tag%3Atutorial&term=tag%3Atutorial, particularly this one.