core/vil/vil_na.cxx File Reference

This file is a cut-and-paste of vnl_na.cxx. More...

#include "vil_na.h"
#include <vxl_config.h>
#include <vcl_istream.h>
#include <vcl_ios.h>

Go to the source code of this file.

Defines
#define	hw   1
#define	lw   0
Functions
double	vil_na (double)
	A particular qNaN to indicate not available.
float	vil_na (float)
	A particular qNaN to indicate not available.
bool	vil_na_isna (double x)
	True if parameter is specific NA qNaN.
bool	vil_na_isna (float x)
	True if parameter is specific NA qNaN.

---

Detailed Description

This file is a cut-and-paste of vnl_na.cxx.

Definition in file vil_na.cxx.

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Define Documentation

#define hw   1

#define lw   0

---

Function Documentation

double vil_na

(

double

)

A particular qNaN to indicate not available.

qNaN to indicate value Not Available.

This returns the bit pattern 0x7ff00000000007a2, as used by Octave and R Don't assume that any VXL functions will treat the value as NA rather than NaN, unless explicitly documented.

Definition at line 18 of file vil_na.cxx.

float vil_na

(

float

)

A particular qNaN to indicate not available.

qNaN to indicate value Not Available.

This returns the bit pattern 0x7f8007a2 Don't assume that any VXL functions will treat the value as NA rather than NaN, unless explicitly documented.

Definition at line 45 of file vil_na.cxx.

bool vil_na_isna

(

double

x

)

True if parameter is specific NA qNaN.

Tests for bit pattern 0x7ff00000000007a2, as used by Octave and R

Definition at line 57 of file vil_na.cxx.

bool vil_na_isna

(

float

x

)

True if parameter is specific NA qNaN.

Tests for bit pattern 0x7F8007a2

Definition at line 70 of file vil_na.cxx.