all¶

all checks if all elements of a vector or matrix are other than zero (0).

Return Value

r is a real row vector, when m is a matrix. r is a scalar, when m is a vector or scalar.

Parameters

Comment

The argument must be real. In order to check if all elements of a complex vector are other than zero, calculate their absolute values.

If the argument is a vector, all will return TRUE (1) if one or more elements are not equal to zero (i.e. TRUE).

If the the argument is a matrix, all will return a column vector.

Example

* a = [0,1,1; ...
       0,0,1]
* all(a)
   0 0 1