If condition: "in each row of a matrix one element is zero and the other one is not zero"

4 次查看（过去 30 天）
Sim
Sim 2022-3-29
评论： Sim 2022-4-6
How can I write the
if condition
in a more compact way than
if size(find(sum(A==0,2)==1),1) == size(A,1)
to express that "in each row of my matrix one element is zero and the other one is not zero" ?
Here an example:
clc;
A = [ 1 0
0 9
12 0
0 2
0 3]
if size(find(sum(A==0,2)==1),1) == size(A,1)
disp('in each row one element is zero and the other one is not zero')
end

请先登录，再回答此问题。

采纳的回答

Voss
Voss 2022-3-29
Ran in:
You can use all()
A = [ 1 0
0 9
12 0
0 2
0 3];
if all(sum(A==0,2) == 1)
disp('in each row one element is zero and the other one is not zero')
end
in each row one element is zero and the other one is not zero

更多回答（2 个）

Stephen23
Stephen23 2022-3-29
编辑：Stephen23 2022-3-29
Ran in:
A = [1,0;0,9;12,0;0,2;0,3]
A = 5×2
1 0 0 9 12 0 0 2 0 3
if any(A,2)&any(~A,2)
disp('in each row one element is zero and the other one is not zero')
end
in each row one element is zero and the other one is not zero
if diff(A==0,1,2) % this might be the most compact
disp('in each row one element is zero and the other one is not zero')
end
in each row one element is zero and the other one is not zero
A = [1,2;0,0;12,0;0,2;0,3]
A = 5×2
1 2 0 0 12 0 0 2 0 3
if any(A,2)&any(~A,2)
disp('in each row one element is zero and the other one is not zero')
else
disp('but not this one!')
end
but not this one!
if diff(A==0,1,2)
disp('in each row one element is zero and the other one is not zero')
else
disp('but not this one!')
end
but not this one!
Arif Hoq
Arif Hoq 2022-3-29
编辑：Arif Hoq 2022-3-29
Ran in:
try this
A = [ 1 0
0 9
12 0
0 2
0 3];
if nnz(A)==size(A,1)
disp('in each row one element is zero and the other one is not zero')
end
in each row one element is zero and the other one is not zero
  2 个评论
Voss
Voss 2022-3-29
Ran in:
This method doesn't take into account the number of zero and non-zero elements by row, only the total:
A = [ 1 2
0 0
12 0
0 2
0 3];
if nnz(A)==size(A,1)
disp('in each row one element is zero and the other one is not zero')
end
in each row one element is zero and the other one is not zero

请先登录，再进行评论。

类别

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

标签

Community Treasure Hunt

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

Start Hunting!

Translated by