how to create matrix iteration

Give me structure please

A=[-1,1,1;0,-1,0;0,0,-1;1,0,0]

iteration command??

some operation

if whole matrix not 0, it will be iterated again

or if whole matrix 0 stop

how can i iterate it

[Walter Roberson]

duplicates http://www.mathworks.co.uk/matlabcentral/answers/78272-check-if-whole-matrix-zero

Answer 1

[Hugo]

You can use while as follows

while any(A)
end

any(A) assumes first that all values of A can be converted to type logical. This conversion turns any number different from zero into 1. Then, if there is any element of A that is 1, then any(A)=1 and the iteration continues.

Is this what you want?

Best regards