QwtScaleArithmetic Class Reference

Arithmetic including a tolerance. More...

#include <qwt_scale_engine.h>

List of all members.

Static Public Member Functions

static double ceil125 (double x)
static double ceilEps (double value, 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 ( double  x  )  [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 ( double  value,
double  intervalSize 
) [static]

Ceil a value, relative to an interval

Parameters:
value Value to ceil
intervalSize Interval size
See also:
floorEps()

double QwtScaleArithmetic::divideEps ( double  intervalSize,
double  numSteps 
) [static]

Divide an interval into steps.

$stepSize = (intervalSize - intervalSize * 10e^{-6}) / numSteps$

Parameters:
intervalSize Interval size
numSteps Number of steps
Returns:
Step size

double QwtScaleArithmetic::floor125 ( double  x  )  [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 ( double  value,
double  intervalSize 
) [static]

Floor a value, relative to an interval

Parameters:
value Value to floor
intervalSize Interval size
See also:
floorEps()


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