Function subtract( array1, array2 )

Description:
Returns the result of subtracting one numeric array from the other element by element. Both arrays must be numeric, and the arrays must have the same length. If either of those conditions is not true, null is returned. The types of the arrays do not need to be the same, so for example it is permitted to subtract an integer array from a floating point array.
Parameters:
array1 (Object)
first array of numeric values
array2 (Object)
second array of numeric values
Return Value (array of floating point):
element-by-element difference of array1 and array2, the same length as the input arrays
Example:
subtract(array(1,2,3), array(0.1,0.2,0.3)) = [0.9, 1.8, 2.7]
Signature:
double[] subtract(Object, Object)