isnumber

Similar to isnumeric but checks length/size, NaNs and range (space). May be very useful in guis, to test user edit inputs...

Syntax:
IS = ISNUMBER(V,N,SPACE)
IS = ISNUMBER(V,SPACE)

Inputs:
V Data, N-D array
N Desired length or size
SPACE Allowed values (default is 'R'):
'Z' : integers, ..., -2, -1, 0, 1, 2, ...
'Z+' : positive integers, 1, 2 ,3, ...
'Z0+' : positive integers including zero, 0, 1, 2, 3, ...
'Z-' : negative integers, ..., -3, -2, -1
'Z0-' : negative integers including zero, ..., -2, -1, 0
'R' : reals (default)
'R+' : reals, positive, higher than zero
'R0+' : reals, positive including zero
'R-' : reals, negative, lower than zero
'R0-' : reals, negative, including zero
'C' : complexes, at least one element

Output:
IS Logical 0 or 1

Examples:
isnumber([1 2 3],3) % 1
isnumber([1 2 3]) % 1
isnumber('www') % 0
isnumber([1 2.1],'Z') % 0
isnumber(rand(3,4),[3 4]) % 1