save values of matrix in indexes of another matrix

hello, i want to

  nimg=1;
                for ii=1:imglen
                    for iii=1:c-4+1

                             hashTable(Idximgseq(ii,iii)+1,nimg)={[ii,iii]};
                             nimg=nimg+1;
                    end
                end

save matrix of values in another matrix,such that each value in the first matrix saved in the same value of index in the second matix,but i have a problem that the counter increses in all times,i want to increse the counter in saparete index,such that:

first matrix(1,1)=15 saved in the index 15 colomn 1 in the second matrix,first matix(1,2)=15 saved in the index 15 colomn 2 in the second matrix,first matrix(1,3)=13 saved in the index 13 colomn 1 in the second matrix, but my problem that first matrix(1,3)=13 saved in the index 13 colomn 3 in the second matrix not in the index 13 colomn 1??

Answer 1

[Suraj Kumar]

Hi Hadeel,

To save values from one matrix into another matrix using specific indices, please follow the steps outlined below:

1. Initialize the required variables and create a ‘counters’ array to track the next available column for each index, ensuring independent management of values.

% Initialize counters for each index 
counters = zeros(maxIndex, 1); 

2. Iterate over the input matrix to determine indices and store pairs in ‘hashTable’. Adjust indices for 1-based indexing by incrementing the respective counter, then place the pair in the correct column.

% Populate the hashTable 
for ii = 1:imglen 
    for iii = 1:c-4+1 
        index = Idximgseq(ii, iii) + 1; 
        counters(index) = counters(index) + 1; 
        hashTable{index, counters(index)} = [ii, iii]; 
    end 
end 

Hope this helps!