Vector programming of sum (greek sigma)
4 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
I have this code:
I want to do it in vectorised programming but I cannot get it to run:
%generate the two random matrices with different height
h1 = 'h1';
disp('enter a number for h1, which is the height of the random matrix')
h1 = input(h1);
A = rand(h1, 200);
%method one
timer1 = tic;
the_sum=0;
for h=1:h1
for w=1:200
the_sum=the_sum+A(h, w);
end
end
toc(timer1)
%method two
timer2 = tic;
h=1:h1,w=1:200;
the_sum2=the_sum2A(h, w)
toc(timer2);
thesum
Thanks for any help
0 Kommentare
Akzeptierte Antwort
Roger Stafford
am 4 Sep. 2013
It looks as though this is what was meant:
%method two
timer2 = tic;
the_sum2 = sum(sum(A,2),1);
toc(timer2);
0 Kommentare
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Labels and Annotations 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!