How to change an exact value of a submatrix from a given matrix ?
7 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi all, I have this type of matrix 5x7:
A = [ NaN 2 6 6 10 11 NaN; 2 2 6 8 10 NaN ; 2 3 8 8 8 10 NaN ; 2 6 8 8 10 11 NaN; NaN 2 11 11 11 2 2]
I'd like to obtain this:
A = [ NaN *3* 6 6 10 11 NaN; *3* *3* 6 8 10 NaN ; *3* 3 8 8 8 10 NaN ; *3* 6 8 8 10 11 NaN; NaN *3* 11 11 11 2 2]
That is, I want to modify only a submatrix (5x2) of this matrix (5x7) by replacing with 3 all values equal to 2. Is it possible? Thank you in advance
0 Kommentare
Antworten (1)
Alok Nimrani
am 13 Feb. 2018
Hi Virgilio,
Yes, it is possible to replace a specific value of a submatrix with a new value. For example, consider the matrix A as
A = [ NaN 2 6 6 10 11 NaN; 2 2 6 8 10 NaN NaN; 2 3 8 8 8 10 NaN; 2 6 8 8 10 11 NaN; NaN 2 11 11 11 2 2]
Now, a 5x2 submatrix of matrix A can be modified as follows to replace all occurrences of ‘2’ in this submatrix with ‘3’:
>> B = A(1:5,1:2); % select a 5x2 submatrix
>> B(B == 2) = 3; % find out all occurrences of ‘2’ in B and replace with ‘3’
>> A(1:5,1:2) = B; % write back the updated values to modify the original matrix
0 Kommentare
Siehe auch
Kategorien
Mehr zu Logical finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!