Scaling a certain element
信息
此问题已关闭。 请重新打开它进行编辑或回答。
显示 更早的评论
Hello
How do I scale a certain element in a matrix
if I want to get a certain type of element, like just the 2's or 5's and multiply them
A = [ 1 2 2; 4 5 1]
A==5 or A==2 MULTIPLY by 3
etc
thanks
0 个评论
回答（1 个）
madhan ravi
2019-1-23
n=5; % certain element
idx=ismember(A,n);
a=A(:);
a(idx)=a(idx)*3;
R=reshape(a,size(A))
%OR
n=5;
idx=find(ismember(A,n));
[I,J]=ind2sub(size(A),idx);
R=A;
R(I,J)=R(I,J)*3
0 个评论
此问题已关闭。
2019-1-23
关闭：
2021-8-20
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
