FFT and convert the vector to a power of two

Question

Javier 2013-3-11

Hi. I am testing an algorithm for automatic identification in case of cerebral paralysis. I wish I apply the algorithm for birds identifications.

the algorithm uses Fast Fourier Transform, but first it converts the vector to a power of 2.

The error is "Subscript indices must either be real positive integers or logicals."

The code is

[x, Fs]=wavread('C:\Users\Javier\Desktop\BioAcustica\rail3.wav'); pow=nextpow2(x); tam=2.^pow; if length(x) ~=tam x(tam)=0; %xxx end size=length(x);

thanks

Answer 1

John Petersen 2013-3-11

编辑：John Petersen 2013-3-11

Try

n = length(x);
pow = nextpow2( n )
tam = 2.^pow;
x(n:tam) = 0;