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/*
File : SmoothTest.cpp
Project : LabPlot
Description : Tests for data smoothing
--------------------------------------------------------------------
SPDX-FileCopyrightText: 2020 Stefan Gerlach <stefan.gerlach@uni.kn>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#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::Double);
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)
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