MATLAB Compiler

static bool IsInf(double x)

Test if value is infinite and returns true if value is infinite.

C++ syntax

• #include "mclcppclass.h"
  bool x = mwArray::IsInf(1.0);     // Returns false
  

Arguments

Value to test for infinity

Return value

Result of test.

Description

Call mwArray::IsInf to determine whether or not a value is equal to infinity or minus infinity. MATLAB stores the value of infinity in a permanent variable named Inf, which represents IEEE arithmetic positive infinity. The value of the variable, Inf, is built into the system; you cannot modify it.

Operations that return infinity include:

• Division by 0. For example, 5/0 returns infinity.
• Operations resulting in overflow. For example, exp(10000) returns infinity because the result is too large to be represented on your machine. If the value equals NaN (Not-a-Number), then mxIsInf returns false. In other words, NaN is not equal to infinity.

static bool IsFinite(double x)

static bool IsNaN(double x)

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