QwtScaleArithmetic - Man Page
Name
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
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