清空筛选条件
清空筛选条件

I am trying to make a zeros matrix where certain places is replaced by a 1

1 次查看（过去 30 天）
Helene Maja Graff-Nielsen
评论： Helene Maja Graff-Nielsen 2021-10-12
I have created a 3x8 matrix of zeroes where i am trying to get place (1,1) and (1,8) and (3,4) to be replaced by ones. so it would look like this:
1 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0
0 0 0 1 0 0 0 0
i have tried to wrote some code for this but i couldn't get it to work.
i have trid this:
b=zeros(3,8)
b([1,3],[1,4,8])=1
but this gives me a matrix that looks like this:
1 0 0 1 0 0 0 1
0 0 0 0 0 0 0 0
1 0 0 1 0 0 0 1

请先登录，再回答此问题。

采纳的回答

C B
C B 2021-10-12
编辑：C B 2021-10-12
Ran in:
b=zeros(3,8);
r = [1 1 3]; % row
c = [1 8 4]; % column
idx = sub2ind(size(b),r,c);
b(idx) = 1;
b
b = 3×8
1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 的更多信息

标签

产品


版本

R2021a

Community Treasure Hunt

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

Start Hunting!

Translated by