Use a cell array in a for loop

Hi,

I want to be able to loop through data in a nested loop and create an array of values each time I loop round, and store this array in a cell array.

My code is currently:

 nrms_data = zeros(48,67); %empty list 48 rows and  with 67 columns spaces 

 for i =(1:67) %this will circle through all the gathers
   for j = (1:48)%this will cycle through all the traces in the data for the individual gather 

        trace_j = data{i}(:,j); % gives j'th trace of the gather_i
        good_trace = data{17}(:,j); 
        NRMS = nrms(good_trace, trace_j); 
        nrms_data{i}(j)= NRMS;

I thought that this would store the value of NRMS as the j'th column in the cell array nrms_data but the error is

 Cell contents assignment to anon-cell array object.

I'm unsure how else to do this. I want to be able to create an array of nrms values for each ith gather and each jth trace and then have a cell array that is 67 columns long with 48 rows.

Answer 1

[Guillaume]

Well yes, you declare nrms_data as a matrix of double, not a cell array. In addition, nrms_data{i}(j) access the scalar element at position j in the matrix of cell i, so that's not what you want.

nrms_data = cell(48, 67);
for i = 1:67   
   %...
       nrms_data{i, j} = NRMS;