How to correct the code?
显示 更早的评论
Hello!
I wrote this code:
X=rand(5,3);
Y=zeros(5,3);
for k=1:5
for j=1:3
if X(k,j)<0.2
Y(k,j)=-1;
else
Y(k,j)=1;
end
end
end
I have to write the same code but without using any loop. How to do this?
1 个评论
Cedric
2019-4-28
Google "MATLAB logical indexing" and understand it, and you'll have the tools for solving your problem.
采纳的回答
KALYAN ACHARJYA
2019-4-28
编辑：KALYAN ACHARJYA
2019-4-28
%Though I am giving the answer here, but please must follow the Google "MATLAB logical indexing" as stated by @Cedric
There are multiple ways, you can do this. One way-
X=rand(5,3);
idx=X<0.2;
Y=ones(5,3);
Y(idx)=-1
3 个评论
You can eliminate a few things:
X = rand(5,3);
idx = X < 0.2;
Y = ones(5,3);
Y(idx) = -1
also, Pawel, display idx and evaluate class(idx).
KALYAN ACHARJYA
2019-4-28
编辑：KALYAN ACHARJYA
2019-4-28
Exactly Yes @Cedric sir, I supposed X and Y are given, therefore I replaced original Y with ones.
Thanks!
pawlo392
2019-4-28
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Language Support 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
