How to select the columns of a matrix which are a multiple of 5?
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
Hye
I don't know how to solve the following exercise:
M is a 3x5000 matrix. A student wants to select the elements on the third row in all columns which are a multiple of 5.
The student writes the following script.
N = zeros(1,1000)
for i = 1:5000
if rem(i,5) == 0
N(i/5) = M(3,i);
end
end
I have to simplify it using only N = M(...). How do I do that?
1 Commento
Guillaume
il 9 Gen 2020
It's hard to give you any help without giving the solution away (which would be cheating).
For which i values would the if be true? Couldn't you pass these values directly as indices of M and not bother with the loop?
Risposte (2)
Alex Mcaulley
il 9 Gen 2020
N = M(3,5:5:end)
2 Commenti
Guillaume
il 9 Gen 2020
In my opinion (as an academic), it'd be better if you didn't post outright solution to homework. Particularly, when it's that easy.
Vedere anche
Categorie
Scopri di più su 2-D and 3-D Plots 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!