File indexing completed on 2024-04-28 15:14:07

 /***************************************************************************
     File                 : SmoothTest.cpp
     Project              : LabPlot
     Description          : Tests for data smoothing
     --------------------------------------------------------------------
     Copyright            : (C) 2020 Stefan Gerlach (stefan.gerlach@uni.kn)
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *  This program is free software; you can redistribute it and/or modify   *
  *  it under the terms of the GNU General Public License as published by   *
  *  the Free Software Foundation; either version 2 of the License, or      *
  *  (at your option) any later version.                                    *
  *                                                                         *
  *  This program is distributed in the hope that it will be useful,        *
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
  *  GNU General Public License for more details.                           *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program; if not, write to the Free Software           *
  *   Foundation, Inc., 51 Franklin Street, Fifth Floor,                    *
  *   Boston, MA  02110-1301  USA                                           *
  *                                                                         *
  ***************************************************************************/
 
 #include "SmoothTest.h"
 #include "backend/core/column/Column.h"
 #include "backend/worksheet/plots/cartesian/XYSmoothCurve.h"
 
 extern "C" {
 #include "backend/nsl/nsl_smooth.h"
 }
 
 //##############################################################################
 
 void SmoothTest::testPercentile() {
     // data
     QVector<int> xData{1,2,3,4,5,6,7,8,9,10};
     QVector<double> yData{47.7,44.,43.,44.96,45.,43.73,38.,47.1,44.,38.3};
     // p=0.5, d=5   (check with LibreOffice and Origin 2020a)
     QVector<double> result50_5{47.7,44,44.96,44,43.73,44.96,44,43.73,44,38.3};
 
     //data source columns
     Column xDataColumn("x", AbstractColumn::ColumnMode::Integer);
     xDataColumn.replaceInteger(0, xData);
 
     Column yDataColumn("y", AbstractColumn::ColumnMode::Numeric);
     yDataColumn.replaceValues(0, yData);
 
     XYSmoothCurve smoothCurve("smooth");
     smoothCurve.setXDataColumn(&xDataColumn);
     smoothCurve.setYDataColumn(&yDataColumn);
 
     //prepare the smooth
     XYSmoothCurve::SmoothData smoothData = smoothCurve.smoothData();
     smoothData.type = nsl_smooth_type_percentile;
     // default
     //smoothData.points = 5;
     //smoothData.percentile = 0.5;
     smoothCurve.setSmoothData(smoothData);
 
     //perform the smooth
     smoothCurve.recalculate();
     const XYSmoothCurve::SmoothResult& smoothResult = smoothCurve.smoothResult();
 
     //check the results
     QCOMPARE(smoothResult.available, true);
     QCOMPARE(smoothResult.valid, true);
 
     const auto* resultXDataColumn{smoothCurve.xColumn()};
     const auto* resultYDataColumn{smoothCurve.yColumn()};
 
     const int np{resultXDataColumn->rowCount()};
     QCOMPARE(np, 10);
 
     for (int i = 0; i < np; i++) {
         QCOMPARE(resultXDataColumn->valueAt(i), (double)i + 1);
         QCOMPARE(resultYDataColumn->valueAt(i), result50_5.at(i));
     }
 }
 
 QTEST_MAIN(SmoothTest)