This function returns True if all the elements of the input parameter can be
evaluated as True.
logical_array : logical
- A logical array of any dimension.
The all function returns a single logical scalar value only
if all of the non-missing value elements of the logical input parameter are True, or can be evaluated as True. This function
is useful for changing multidimensional logical results from logical
expressions into a single scalar value, which is required by the if statement. All numeric values can be
coerced to a logical value. Values that are 0 are interpreted as False and values that are non-zero are interpreted as True.
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$Revision: 1.8 $ $Date: 1998/06/15 21:28:54 $