isnanΒΆ

isnan checks if the argument is not a number (NaN). For example 0/0.

r = isnan(m)

Return Value

r is TRUE (1) if m is NaN, otherwise it is FALSE (0).

Parameters

m

m is a real scalar or real matrix.

Example

1/0
    1.#INF
0/0
    -1.#IND
isinf(1/0)
    1.0000
isinf(0/0)
    1.0000
isnan(1/0)
    0.0000
isnan(0/0)
    1.0000
isnan(0/0)
    1.0000
isnan(1e300*1e300)
    1.0000
isnan(-1e300*-1e300)
    1.0000

See also

Overview Mathematic, isinf

id-401091