How can I store all outputs from a nested for loop?

1 visualizzazione (ultimi 30 giorni)
I know this might be a common problem, and tried a lot of different answers posted under similar questions. Anyway, here's a basic idea.
a = rand(2,3);
b = rand(2,3);
c = rand(2,3);
for i=1:length(a(:,1))
for j=1:length(a(1,:))
z = [a(i,j), b(i,j), c(i,j)]
As you can see, I get a 1x3 matrix for z in every iteration, but I want to store them, so I'd have a z as 6x3. I know I haven't preallocated for z here, btw.

Risposta accettata

Stephen23 il 12 Lug 2022
Modificato: Stephen23 il 12 Lug 2022
This is easier using linear indexing:
a = rand(2,3);
b = rand(2,3);
c = rand(2,3);
z = nan(numel(a),3); % preallocate
for k = 1:numel(a)
z(k,:) = [a(k),b(k),c(k)];
z = 6×3
0.8970 0.9894 0.0327 0.1664 0.5844 0.5157 0.1946 0.8872 0.6354 0.5858 0.9135 0.5917 0.1652 0.9554 0.0871 0.9033 0.2481 0.6914

Più risposte (0)


Scopri di più su Creating and Concatenating Matrices 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!

Translated by