How to vectorize this simple for-loop
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
Felix Lauwaert
am 19 Aug. 2015
Kommentiert: Felix Lauwaert
am 19 Aug. 2015
Hello,
I'm trying to vectorize something like this:
z=zeros(3); x=[1 2 3]; y=x;
for i=1:length(x) %or y, doesn't matter
z( x(i),y(i) )=z( x(i),y(i) ) + 1;
end
So
z= [1 0 0 ; 0 1 0 ; 0 0 1]
What I really want is to do it for any x and y vectors in a 1000by1000 zero matrix.
I tried to do:
z(x,y)=z(x,y)+1;
But I get all values of z =1. I also tried:
z(x.,y.)=z(x.,y.)+1;
But an error message appears.
Thanks for your help.
0 Kommentare
Akzeptierte Antwort
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Loops and Conditional Statements finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!