Multiplying each column of a matrix with a specific value
32 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
Areesh Adil
il 4 Feb 2020
Commentato: Areesh Adil
il 4 Feb 2020
I have a matrix
mat=[2,1,0,0;1,0,0,0;0,0,0,1]
I want to multiply the first column by 25, the second column by 5, the third column by 10 and the fourth column by 1 in a way that I get:
mat=[50,5,0,0;25,0,0,0;0,0,0,1]
Also, can the answer be generalized as I might end up adding more rows later on.
Thanks
0 Commenti
Risposta accettata
James Tursa
il 4 Feb 2020
Modificato: James Tursa
il 4 Feb 2020
mat=[2,1,0,0;1,0,0,0;0,0,0,1]; % 2D matrix
f = [25,5,10,1]; % row vector
result = f .* mat; % element-wise multiply with virtual expansion of row vector
If you have an earlier version of MATLAB, then use bsxfun:
result = bsxfun(@times,f,mat); % same functionality as f .* mat
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Logical in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!