boxdatareader.cpp
88 lines
| 2.7 KiB
| text/x-c
|
CppLexer
Miikka Heikkinen
|
r2854 | /**************************************************************************** | ||
Mika Salmela
|
r2548 | ** | ||
|
Miikka Heikkinen
|
r2854 | ** Copyright (C) 2016 The Qt Company Ltd. | ||
| ** Contact: https://www.qt.io/licensing/ | ||||
|
Mika Salmela
|
r2548 | ** | ||
|
Miikka Heikkinen
|
r2854 | ** This file is part of the Qt Charts module of the Qt Toolkit. | ||
|
Mika Salmela
|
r2548 | ** | ||
|
Miikka Heikkinen
|
r2854 | ** $QT_BEGIN_LICENSE:GPL$ | ||
Titta Heikkala
|
r2845 | ** Commercial License Usage | ||
| ** Licensees holding valid commercial Qt licenses may use this file in | ||||
| ** accordance with the commercial license agreement provided with the | ||||
| ** Software or, alternatively, in accordance with the terms contained in | ||||
| ** a written agreement between you and The Qt Company. For licensing terms | ||||
|
Miikka Heikkinen
|
r2854 | ** and conditions see https://www.qt.io/terms-conditions. For further | ||
| ** information use the contact form at https://www.qt.io/contact-us. | ||||
| ** | ||||
| ** GNU General Public License Usage | ||||
| ** Alternatively, this file may be used under the terms of the GNU | ||||
| ** General Public License version 3 or (at your option) any later version | ||||
| ** approved by the KDE Free Qt Foundation. The licenses are as published by | ||||
| ** the Free Software Foundation and appearing in the file LICENSE.GPL3 | ||||
| ** included in the packaging of this file. Please review the following | ||||
| ** information to ensure the GNU General Public License requirements will | ||||
| ** be met: https://www.gnu.org/licenses/gpl-3.0.html. | ||||
|
Mika Salmela
|
r2548 | ** | ||
|
Titta Heikkala
|
r2845 | ** $QT_END_LICENSE$ | ||
| ** | ||||
|
Miikka Heikkinen
|
r2854 | ****************************************************************************/ | ||
|
Mika Salmela
|
r2548 | |||
| #include "boxdatareader.h" | ||||
| BoxDataReader::BoxDataReader(QIODevice *device) : | ||||
| QTextStream(device) | ||||
| { | ||||
| } | ||||
|
Mika Salmela
|
r2556 | void BoxDataReader::readFile(QIODevice *device) | ||
|
Mika Salmela
|
r2548 | { | ||
|
Mika Salmela
|
r2556 | QTextStream::setDevice(device); | ||
| } | ||||
| QBoxSet *BoxDataReader::readBox() | ||||
| { | ||||
| //! [1] | ||||
|
Mika Salmela
|
r2548 | QString line = readLine(); | ||
| if (line.startsWith("#")) | ||||
| return 0; | ||||
|
Mika Salmela
|
r2556 | //! [1] | ||
|
Mika Salmela
|
r2548 | |||
|
Mika Salmela
|
r2556 | //! [2] | ||
|
Mika Salmela
|
r2548 | QStringList strList = line.split(" ", QString::SkipEmptyParts); | ||
|
Mika Salmela
|
r2556 | //! [2] | ||
|
Mika Salmela
|
r2548 | |||
|
Mika Salmela
|
r2556 | //! [3] | ||
| sortedList.clear(); | ||||
|
Mika Salmela
|
r2548 | for (int i = 1; i < strList.count(); i++) | ||
| sortedList.append(strList.at(i).toDouble()); | ||||
| qSort(sortedList.begin(), sortedList.end()); | ||||
|
Mika Salmela
|
r2556 | //! [3] | ||
|
Mika Salmela
|
r2548 | |||
| int count = sortedList.count(); | ||||
|
Mika Salmela
|
r2556 | //! [4] | ||
|
Mika Salmela
|
r2548 | QBoxSet *box = new QBoxSet(strList.first()); | ||
| box->setValue(QBoxSet::LowerExtreme, sortedList.first()); | ||||
| box->setValue(QBoxSet::UpperExtreme, sortedList.last()); | ||||
| box->setValue(QBoxSet::Median, findMedian(0, count)); | ||||
| box->setValue(QBoxSet::LowerQuartile, findMedian(0, count / 2)); | ||||
|
Mika Salmela
|
r2556 | box->setValue(QBoxSet::UpperQuartile, findMedian(count / 2 + (count % 2), count)); | ||
| //! [4] | ||||
|
Mika Salmela
|
r2548 | |||
| return box; | ||||
| } | ||||
| qreal BoxDataReader::findMedian(int begin, int end) | ||||
| { | ||||
|
Mika Salmela
|
r2556 | //! [5] | ||
|
Mika Salmela
|
r2548 | int count = end - begin; | ||
|
Mika Salmela
|
r2556 | if (count % 2) { | ||
| return sortedList.at(count / 2 + begin); | ||||
|
Mika Salmela
|
r2548 | } else { | ||
| qreal right = sortedList.at(count / 2 + begin); | ||||
| qreal left = sortedList.at(count / 2 - 1 + begin); | ||||
| return (right + left) / 2.0; | ||||
| } | ||||
|
Mika Salmela
|
r2556 | //! [5] | ||
|
Mika Salmela
|
r2548 | } | ||