Use generic matrix an input into a function in MATLAB

Hi All,

I am trying to write a function that can take any matrix (lets call it x for agruments sake) as input and output a TRUE/FALSE statement.

The context is to check if any of the diagonals in the matrix is a "0" value.

I have tried to do the following:

function DIAG = iszero("insert generic square matrix" ie. x)

DIAG = any(diag(x))

end

The aim is to go to my command window and write:

iszero("insert any matrix from workspace")

For example, if I load a matrix 30x30 called Z1, I want to write:

iszero(Z1) and then give me a logical output.

At the moment with the below is giving me an error.

function DIAG = iszero(x)

DIAG = any(diag(x))

end

"Not enough input arguments.

Error in ppr (line 2)

E = any(diag(x))"

Any assistance is much appreciated.

Answer 1

[Bhaskar R]

function output = iszero(Z)
    output = any(diag(Z) == 0);
end

[Xenofon Antoniou]

Thanks, this worked in a way opposite to what I wanted by made it work to give a TRUE output if there are no-zero's.

Cheers

[Bhaskar R]

 output = ~any(diag(Z) == 0);