DOKK / manpages / debian 12 / libqwt-doc / QwtScaleArithmetic.3.en
QwtScaleArithmetic(3) Qwt User's Guide QwtScaleArithmetic(3)

QwtScaleArithmetic - Arithmetic including a tolerance.

#include <qwt_scale_engine.h>


static double ceilEps (double value, double intervalSize)
static double floorEps (double value, double intervalSize)
static double divideEps (double intervalSize, double numSteps)
Divide an interval into steps. static double divideInterval (double intervalSize, int numSteps, uint base)

Arithmetic including a tolerance.

Ceil a value, relative to an interval

Parameters:

value Value to be ceiled
intervalSize Interval size

Returns:

Rounded value

See also:

floorEps()

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

Parameters:

intervalSize Interval size
numSteps Number of steps

Returns:

Step size

Calculate a step size for a given interval

Parameters:

intervalSize Interval size
numSteps Number of steps
base Base for the division ( usually 10 )

Returns:

Calculated step size

Floor a value, relative to an interval

Parameters:

value Value to be floored
intervalSize Interval size

Returns:

Rounded value

See also:

floorEps()

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Wed Jan 2 2019 Version 6.1.4