| External Interfaces/API Reference | |
Determine whether or not a value is infinite
Fortran Syntax
integer*4 function mexIsInf(value) real*8 value
Arguments
value
The double-precision, floating-point number you are testing.
Returns
true if value is infinite, and false otherwise.
Description
Call mexIsInf to determine whether or not value is equal to infinity. MATLAB stores the value of infinity in a permanent variable named Inf, which represents IEEE arithmetic positive infinity. The value of Inf is built in to the system; you cannot modify it.
Operations that return infinity include:
0. For example, 5/0 returns infinity.exp(10000) returns infinity because the result is too large to be represented on your machine.If value equals NaN (Not-a-Number), then mexIsInf returns false. In other words, NaN is not equal to infinity.
See Also
| | mexIsFinite | mexIsNaN | |