How can I solve this issue?

Unable to perform assignment because the size of the left side is 153-by-1 and the size of the right side is 51-by-1-by-3.

I should run for loop 500 times.

d_pred=zeros(153*500);
ne=500
for i = 1 : ne
    d_pred(:,i) = calcola_dati_pre_stack(Vpsim(:,i), Vssim(:,i), Rhosim(:,i), wavelet, ang);
end

[Rik]

Apparently your function has an output of length 51, not 153. Why did you expect otherwise?

[RADWAN A F ZEYADI]

@Rik yes the output 51*1*3 because i am apllying an algorithm and i should run it at least 500 so iam confused however i have uploaded the functions so what i have to do

regards

[DGM]

I think you might have attached the wrong file. calcola_dati_pre_stack() calls CMP_zoepprtiz(), which is not included. You included applico_RPM_II(), which does not appear to be needed by any of these calculations.

You also might want to make the usage example above complete enough that it can actually replicate the error. As it is, the preallocation is bogus and there are missing variables.

This may be as simple as fixing some indexing issues in the function files, or if nothing else, simply reshaping the output to be a vector.

Answer 1

[Image Analyst]

You can use squeeze() to get rid of the singleton dimension:

m = calcola_dati_pre_stack(Vpsim(:,i), Vssim(:,i), Rhosim(:,i), wavelet, ang);
% m is 51x1x3.  Use squeeze to make it 51x3.
m = squeeze(m); % Now m is 51x3.

Now, what does each of the 3 columns of this new m represent? Is it OK if we just take all the columns and stack them on top of each other? Like

d_pred=zeros(153*500);
ne=500
for i = 1 : ne    
    m = calcola_dati_pre_stack(Vpsim(:,i), Vssim(:,i), Rhosim(:,i), wavelet, ang);
    % m is 51x1x3.  Use squeeze to make it 51x3.
    m = squeeze(m); % Now m is 51x3.
    % Turn m from 51x3 into 153x1 column vector by using (:),
    % and assign to the i'th column of d_pred.
    d_pred(:,i) = m(:);
end

[RADWAN A F ZEYADI]

@Image Analystthank you so much

[Image Analyst]

OK, but I guess it didn't solve your problem since you haven't accepted my Answer. So what else is wrong with it?