QwtScaleArithmetic man page

QwtScaleArithmetic —

Arithmetic including a tolerance.

Synopsis

#include <qwt_scale_engine.h>

Static Public Member Functions

static double ceil125 (double x)

static double ceilEps (double value, double intervalSize)

static int compareEps (double value1, double value2, double intervalSize)

static double divideEps (double interval, double steps)

static double floor125 (double x)

static double floorEps (double value, double intervalSize)

Detailed Description

Arithmetic including a tolerance.

Member Function Documentation

double QwtScaleArithmetic::ceil125 (doublex) [static] Find the smallest value out of {1,2,5}*10^n with an integer number n which is greater than or equal to x

Parameters:

x Input value

double QwtScaleArithmetic::ceilEps (doublevalue, doubleintervalSize) [static] Ceil a value, relative to an interval

Parameters:

value Value to ceil
intervalSize Interval size

See also:

floorEps()

int QwtScaleArithmetic::compareEps (doublevalue1, doublevalue2, doubleintervalSize) [static]

Compare 2 values, relative to an interval. Values are 'equal', when : $cdot value2 - value1 <= abs(intervalSize * 10e^{-6})$

Parameters:

value1 First value to compare
value2 Second value to compare
intervalSize interval size

Returns:

0: if equal, -1: if value2 > value1, 1: if value1 > value2

double QwtScaleArithmetic::divideEps (doubleintervalSize, doublenumSteps) [static]

Divide an interval into steps. $stepSize = (intervalSize - intervalSize * 10e^{-6}) / numSteps$.PP Parameters:

intervalSize Interval size
numSteps Number of steps

Returns:

Step size

double QwtScaleArithmetic::floor125 (doublex) [static]

Find the largest value out of {1,2,5}*10^n with an integer number n which is smaller than or equal to x. Parameters:

x Input value

double QwtScaleArithmetic::floorEps (doublevalue, doubleintervalSize) [static] Floor a value, relative to an interval

Parameters:

value Value to floor
intervalSize Interval size

See also:

floorEps()

Author

Generated automatically by Doxygen for Qwt User's Guide from the source code.

Info

Mon Aug 1 2011 Version 5.2.2 Qwt User's Guide