How to put values in matrix based on some condition?

Question

Rasif Ajwad 2015-10-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/251404-how-to-put-values-in-matrix-based-on-some-condition

评论： Rob Campbell 2015-10-28

采纳的回答： Rob Campbell

Hi,

I have a matrix. I want put 0 value in (2,1), (3,1), (4,1), (5,1) ... (n,1) positions. ***Not in (1,1) position.

Is it possible to do it with a single line of code?

Thanks.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Rob Campbell 2015-10-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/251404-how-to-put-values-in-matrix-based-on-some-condition#answer_197589

在 MATLAB Online 中打开

>> r=rand(5);
>> r(2:end,1)=0
r =
    0.0596    0.0967    0.6596    0.4538    0.1734
         0    0.8181    0.5186    0.4324    0.3909
         0    0.8175    0.9730    0.8253    0.8314
         0    0.7224    0.6490    0.0835    0.8034
         0    0.1499    0.8003    0.1332    0.0605