Single coloumn if columns = 1

Hi everyone, i have a logical array P 378812x400 logical.

I want to create a single column that has the value of row 1 if in the 400 columns at least 1 row was 1.

I tried with this, but it does not run:

N=400

for j=1:N-1

for i=2:N

Q=or(P(:,j), P (:,i));

end

end

Thank you.

[madhan ravi]

just give a small example and your desired result ?

[Riccardo Rossi]

P=

0 0 0 0

0 0 1 0

0 0 0 0

0 1 1 0

I would like to have:

Q=

0

1

0

1

[Stephen23]

any(P,2)

[Riccardo Rossi]

Thank you

Answer 1

[KSSV]

P = round(rand(10,3)) ;
idx = find(any(P,2))

Read about any

Answer 2

[madhan ravi]

Q=sum(P,2)