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

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

Answer 1

[Voss]

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

[Sim]

THanks a lot, very clear and compact!

[Voss]

You're welcome!

Answer 2

[Stephen23]

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!

[Sim]

Very cool answer @Stephen, thanks a lot !!! I really like your proposal:

diff(A==0,1,2)

:-)

Answer 3

[Arif Hoq]

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

[Voss]

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

[Sim]

Many thanks @Arif Hoq..! A very compact "if statement"! I would accept all the answers... !!