Vector programming of sum (greek sigma)

조회 수: 4 (최근 30일)
Brian
Brian 2013년 9월 4일
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

채택된 답변

Roger Stafford
Roger Stafford 2013년 9월 4일
It looks as though this is what was meant:
%method two
timer2 = tic;
the_sum2 = sum(sum(A,2),1);
toc(timer2);

추가 답변 (0개)

카테고리

Help CenterFile Exchange에서 Labels and Annotations에 대해 자세히 알아보기

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by