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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef com_sun_star_chart2_XRegressionCurveCalculator_idl
#define com_sun_star_chart2_XRegressionCurveCalculator_idl
#include <com/sun/star/uno/XInterface.idl>
#include <com/sun/star/util/XNumberFormatsSupplier.idl>
#include <com/sun/star/lang/IllegalArgumentException.idl>
#include <com/sun/star/geometry/RealPoint2D.idl>
#include <com/sun/star/chart2/XScaling.idl>
module com
{
module sun
{
module star
{
module chart2
{
interface XRegressionCurveCalculator : com::sun::star::uno::XInterface
{
/** set calculation properties for curve calculation.
@param degree
Degree of polynomial regression curve, value should be greater than zero
If the curve is not polynomial, this property has no effect.
@param period
Period of a moving average regression curve, value should greater or equal to 2
If the curve is not moving average regression curve, this property has no effect.
@param forceIntercept
Should force the intercept value.
@param interceptValue
Intercept value.
*/
void setRegressionProperties( [in] long degree,
[in] boolean forceIntercept,
[in] double interceptValue,
[in] long period);
/** recalculates the parameters of the internal regression curve according to
the <i>x</i>- and <i>y</i>-values given.
@param aXValues
All x-values that represent the measurement points on
which the regression is based
@param aYValues
All y-values that represent the measurement points on
which the regression is based
*/
void recalculateRegression( [in] sequence< double > aXValues,
[in] sequence< double > aYValues);
/** calculates the value of the regression curve for <i>x</i>.
@param x
The abscissa value for which the value of the regression
curve should be calculated. All numbers that are part of
the domain of the regression function are valid.
@return
If <i>x</i> is element of the domain of the regression
curve function, the result is its value.
@throws com::sun::star::lang::IllegalArgumentException
If <i>x</i> is not part of the domain of the regression
function.
*/
double getCurveValue( [in] double x )
raises( com::sun::star::lang::IllegalArgumentException );
/** calculate multiple points of a regression curve at once. Note
that this method may optimize the output by returning less
points, e.g. for a line you may get only two resulting points
instead of nPointCount() points. This is only
allowed if the parameter
bMaySkipPointsInCalculation() is set to
`TRUE`.
<p>It is important that a renderer takes the scalings into
account. When one of these parameters is unknown, no
optimization must be done.</p>
@param min the abscissa value for the starting point.
@param max the abscissa value for the ending point.
@param nPointCount the number of points to calculate.
@param bMaySkipPointsInCalculation determines whether it is
allowed to skip points in the calculation. When this
parameter is `TRUE` it is assumed that the underlying
coordinate system is Cartesian.
@param xScalingX a scaling that is used for the values in
x-direction
@param xScalingY a scaling that is used for the values in
y-direction
*/
sequence< com::sun::star::geometry::RealPoint2D > getCurveValues(
[in] double min,
[in] double max,
[in] long nPointCount,
[in] XScaling xScalingX,
[in] XScaling xScalingY,
[in] boolean bMaySkipPointsInCalculation )
raises( com::sun::star::lang::IllegalArgumentException );
/** Returns the value of the correlation coefficient for the given
regression. This value is often denoted as <i>r</i> or
<i>R</i>.
<p>The value of <i>r</i> is signed. Often
<i>r</i><sup>2</sup> is used instead of <i>r</i> to denote
a regression curve's accuracy.</p>
@return
The return value is the fraction of the variance in the
data that is explained by the regression.
*/
double getCorrelationCoefficient();
/** Retrieve a string showing the regression curve's function with
calculated parameters.
@return
The string returned contains the regression curve's
formula in a form <pre>"f(x) = ..."</pre>, where the
calculated parts are filled out. For a linear regression
you might get <pre>"f(x) = 0.341 x + 1.45"</pre>.
*/
string getRepresentation();
/** Returns a representation using the given number format for formatting all numbers
contained in the formula.
@see getRepresentation
*/
string getFormattedRepresentation( [in] com::sun::star::util::XNumberFormatsSupplier xNumFmtSupplier,
[in] long nNumberFormatKey );
};
} ; // chart2
} ; // com
} ; // sun
} ; // star
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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