function deconv

the function decov this programmed to mark erreur when one of tha values inside the matrix is zero.How i can change the algorithm of this function?

Answer 1

[Paulo Silva]

Do this at your own risk and there's no warranty that the function will work correctly after the change

edit deconv

put one % before the error line

error('MATLAB:deconv:ZeroCoef1', 'First coefficient of A must be non-zero.')

With the % the line won't be evaluated thus the error command doesn't cause the function to abort.

%error('MATLAB:deconv:ZeroCoef1', 'First coefficient of A must be non-zero.')

And save the file.

Another way that should work is to replace the zero value with a small value like 1e-6, it's probably better to replace than to change the deconv function.

It's just the first value that can't be zero, so you go to your data and change the first value like this

Mydata(1)=1e-6 %MyData should be replaced by your variable name

[Sofia degli Alessandri]

I'm having the same issue as carlos- I tried using your idea of "Mydata(1)=1e-6 %MyData should be replaced by your variable name" but now I just receive another error message:

??? Error using ==> filter

First two arguments must be vectors.

Error in ==> deconv at 32

[q,zf] = filter(b, a, [1 zeros(1,nb-na)]);

I'm trying to extract a HRIR from a convolved signal by deconvolving it with the test signal. I've wavread the two .wav files in as x and y and have followed the doc on deconv.

If anyone had suggestions they would be greatly appreciated!

[Walter Roberson]

What are size(b) and size(a) ? If they are not vectors, we are going to need the code that creates them (and possibly some code before that too) in order to figure out why they are not vectors.

Did you possibly accidentally use

a=1e-6

instead of

a(1)=1e-6

??

[Sofia degli Alessandri]

size(b) and size(a) are both : 1852200 2

I did use a(1)=1e-6 but the error message shown above still appears.

Thank you for all the help

[Walter Roberson]

Well, like it says, the first two arguments must be vectors. You are using arrays.

If you are using a sound read in from a file, keep in mind that most audio files are stereo, with (:,1) being the left channel and (:,2) being the right channel. You appear to be trying to deconv() a stereo signal, which deconv() cannot handle directly.