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UNIX for Dummies Questions & Answers
converting string to number in shell script
Post 302600850 by itkamaraj on Wednesday 22nd of February 2012 08:57:56 AM
02-22-2012
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LEARN ABOUT DEBIAN
qwtscaletransformation
QwtScaleTransformation(3) Qwt User's Guide QwtScaleTransformation(3) NAME
QwtScaleTransformation - Operations for linear or logarithmic (base 10) transformations. SYNOPSIS
#include <qwt_scale_map.h> Public Types enum Type { Linear, Log10, Other } Public Member Functions virtual QwtScaleTransformation * copy () const virtual double invXForm (double x, double p1, double p2, double s1, double s2) const QwtScaleTransformation (Type type) Type type () const virtual double xForm (double x, double s1, double s2, double p1, double p2) const virtual ~QwtScaleTransformation () Detailed Description Operations for linear or logarithmic (base 10) transformations. Constructor &; Destructor Documentation QwtScaleTransformation::QwtScaleTransformation (Typetype) Constructor for a linear transformation. QwtScaleTransformation::~QwtScaleTransformation () [virtual] Destructor. Member Function Documentation QwtScaleTransformation * QwtScaleTransformation::copy () const [virtual] Create a clone of the transformation. double QwtScaleTransformation::invXForm (doublep, doublep1, doublep2, doubles1, doubles2) const [virtual] Transform a value from the coordinate system of the paint device into the coordinate system of a scale. Parameters: p Value related to the coordinate system of the paint device p1 First border of the coordinate system of the paint device p2 Second border of the coordinate system of the paint device s1 First border of the coordinate system of the scale s2 Second border of the coordinate system of the scale Returns: linear mapping: s1 + ( s2 - s1 ) / ( p2 - p1 ) * ( p - p1 ); log10 mapping: exp((p - p1) / (p2 - p1) * log(s2 / s1)) * s1; QwtScaleTransformation::Type QwtScaleTransformation::type () const [inline] Returns: Transformation type double QwtScaleTransformation::xForm (doubles, doubles1, doubles2, doublep1, doublep2) const [virtual] Transform a value from the coordinate system of a scale into the coordinate system of the paint device. Parameters: s Value related to the coordinate system of the scale s1 First border of the coordinate system of the scale s2 Second border of the coordinate system of the scale p1 First border of the coordinate system of the paint device p2 Second border of the coordinate system of the paint device Returns: linear mapping: p1 + (p2 - p1) / (s2 - s1) * (s - s1); log10 mapping: p1 + (p2 - p1) / log(s2 / s1) * log(s / s1); Author Generated automatically by Doxygen for Qwt User's Guide from the source code. Version 5.2.2 Mon Aug 1 2011 QwtScaleTransformation(3)