MATLAB Application Program Interface Reference Help Desk

mxIsInf

Purpose

True if value is infinite

C Syntax

Arguments

value

The double-precision, floating-point number that you are testing.

Returns

true if value is infinite; otherwise, returns false.

Description

Call mxIsInf 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 into the system; you cannot modify it.

Operations that return infinity include

If value equals NaN (Not-a-Number), then mxIsInf returns false. In other words, NaN is not equal to infinity.

Example

See mxIsInf.c in the mx subdirectory of the examples directory.

See Also

mxIsFinite, mxIsNaN



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