matrix dimension mismatch error

Hi, this is my code.

my data is known as matrix_data(1,512). I want to save every iteration of matrix_data in a new array(new_matrix_data) so that in new_matrix_data there will be (1,5120). However, there is error in my code 'matrix dimensions mismatch' in this line new_matrix_data(1,k:k+512) = matrix_data(1,:);

Anyone can help me?

new_matrix_data=zeros(1,5120);   

l=1;

      k=1;
            while l~=2;
          new_matrix_data(1,k:k+512) = matrix_data(1,:);  
     k=k+512;
          save new_matrix_data 'new_matrix_data' 
         if k>=5120
             new_data_matrix=zeros(1,5120);
             k=1;
         end
            end

Answer 1

[Walter Roberson]

k:k+512 is 513 elements. k:k+511 would be 512 elements.

[mira]

hi,

Thank you for the reply. However, I still got an error 'subscripted assignment dimension mismatch'. why is that so?

[Walter Roberson]

Please show your corrected code and show size(matrix_data) at the time of the error. You can use

dbstop if error

and run and then when the error occurs you can see what size(matrix_data) is.

[mira]

It works. However, the data keep overwrites and only saved the last data.

[Walter Roberson]

That is what is expected to happen when you continually save to the same file name.

Hint:

N = N + 1;
savefile_name = sprintf('new_matrix_data_%04d', N);
save(safefile_name, 'new_matrix_data');

[mira]

Actually I have tried the same concept as the above code but I will try by followed your code.