for loop stack the data

i made a code which can detect the specific number's position in array

like this

for k=77:176;

[col,row]=find(M==k);

end

but the data didn't stack the whole data. after running the code only show the 176's data. how can i get the whole data?

Answer 1

[Mathieu NOE]

hello

my suggestion

if M is (like here) a 1D array so the col saved is always one; this can be removed from the code if needed.

    M = 1:10:1000;
    ind = 0;
    
 for k=77:176
      [col,row] = find(M==k);
      
      if ~isempty(col) & ~isempty(row)
          ind = ind +1;
          k_saved(ind) = k;
          col_saved(ind) = col;
          row_saved(ind) = row;
      end
 end

if M is a 2D array , see this : (same code in fact , but now col is not only one of course)

     M = 71:1:170;
    M = reshape(M,10,10);
    ind = 0;
    
 for k=77:176
      [col,row] = find(M==k);
      
      if ~isempty(col) & ~isempty(row)
          ind = ind +1;
          k_saved(ind) = k;
          col_saved(ind) = col;
          row_saved(ind) = row;
      end
 end

Answer 2

[Jan]

Maybe:

col = cell(1, 176);
row = cell(1, 176);
for k = 77:176 
   [col{k}, row{k}] = find(M == k);
end