matrix variable problem in matlab
显示 更早的评论
I have been assigned to run these codes and report what are they for. I'm good up to the 8th line. After that i'm lost and don't know what the last 3 lines do. I'll appreciate it if someone help me and explain what they do.
Thanks
a=rand(5);
b=a;
m=size(a,2);
x=1:m;
y=1:m;
xx=x'*ones(1,m);
yy=(y'*ones(1,m))';
c=xx==yy;
b(c)=0
c=xx.^2>yy;
a(c)=0
采纳的回答
Henry Tran
2020-12-10
编辑：Henry Tran
2020-12-10
Hi,
b(c)=0 %sets all values of b to 0, which are along the 1 of c
c=xx.^2>yy; %checks if the value of "xx.^2" is greater than the values in yy. If it is true then it returns as 1.
a(c)=0 --> %same principle as b(c)=0
I hope it answers your question.
4 个评论
javad hemati
2020-12-10
javad hemati
2020-12-10
the cyclist
2020-12-10
I found the phrasing confusing, too. Here is an example. Suppose b and c are
b = [2 3 5 7 11]
c = [1 0 1 1 0];
Then b(c) will be
[2 5 7]
In other words, b(c) picks out the elements of b where c is equal to 1.
javad hemati
2020-12-10
更多回答（1 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Matrix Indexing 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 
