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PyQt5+QtChart实现绘制极坐标图

作者：SongYuLong的博客

QChart是一个QGraphicScene中可以显示的QGraphicsWidget。本文将利用QtChart实现极坐标图的绘制，文中的示例代码讲解详细，感兴趣的小伙伴可以了解一下

散点极坐标图

import sys
import random
import math

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import Qt
from PyQt5.QtChart import QScatterSeries, QPolarChart, QChart, QChartView, QValueAxis

class MyPolarWindow(QWidget):
    def __init__(self, parent=None):
        super(MyPolarWindow, self).__init__(parent)

        # 创建图表
        polarChart = QPolarChart()
        chartView = QChartView()

        # 创建Series
        scatterSeries = QScatterSeries()

        # 添加数据
        for value in range(1, 50):
            scatterSeries.append(value, random.random()*10)
            #scatterSeries.append(QPointF(value, random.random()*10))
        
        scatterSeries.setMarkerSize(10)
        scatterSeries.setColor(Qt.red)
        scatterSeries.setBorderColor(Qt.yellow)
        scatterSeries.setMarkerShape(QScatterSeries.MarkerShapeCircle)  # 圆形标记
        # scatterSeries.setMarkerShape(QScatterSeries.MarkerShapeRectangle) # 方形标记        
        scatterSeries.setName("星位图")

        polarChart.addSeries(scatterSeries)
        polarChart.setContentsMargins(0, 0, 0, 0)
        polarChart.setTheme(QChart.ChartThemeBlueCerulean)
        # polarChart.createDefaultAxes()


        # 设置 角向轴
        angularAxis = QValueAxis()
        angularAxis.setTickCount(9)
        angularAxis.setLabelFormat("%.2f")
        angularAxis.setShadesVisible(True)
        angularAxis.setShadesBrush(QBrush(QColor(230, 230, 255)))
        polarChart.addAxis(angularAxis, QPolarChart.PolarOrientationAngular)
        angularAxis.setRange(0, 20) # 必须设置范围，否则图表无法显示

        # 设置 径向轴
        radialAxis = QValueAxis()
        radialAxis.setTickCount(5)
        radialAxis.setLabelFormat("%d")
        polarChart.addAxis(radialAxis, QPolarChart.PolarOrientationRadial)
        radialAxis.setRange(0, 10)
        
        chartView.setChart(polarChart)
        chartView.setFocusPolicy(Qt.NoFocus)
        chartView.setRenderHint(QPainter.Antialiasing)

        vbox = QVBoxLayout()
        vbox.addWidget(chartView)
        self.setLayout(vbox)

        # polarChart.zoomOut()
        # polarChart.zoomIn()
        # polarChart.scroll(-1.0, 0)
        # polarChart.scroll(1.0, 0)
        # polarChart.scroll(0, 1.0)
        # polarChart.scroll(0, -1.0)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = MyPolarWindow()
    win.show()
    sys.exit(app.exec_())

折线极坐标图

import sys
import random
import math

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import Qt
from PyQt5.QtChart import QLineSeries, QPolarChart, QChart, QChartView, QValueAxis

class MyPolarWindow(QWidget):
    def __init__(self, parent=None):
        super(MyPolarWindow, self).__init__(parent)
        self.setWindowTitle("散点极坐标图")
        # 创建图表
        polarChart = QPolarChart()
        chartView = QChartView()

        # 创建Series
        scatterSeries = QLineSeries()

        # 添加数据
        for value in range(1, 50):
            scatterSeries.append(value, random.random()*10)
            #scatterSeries.append(QPointF(value, random.random()*10))
        

        scatterSeries.setName("折线极坐标图")

        polarChart.addSeries(scatterSeries)
        polarChart.setContentsMargins(0, 0, 0, 0)
        polarChart.setTheme(QChart.ChartThemeBlueCerulean)
        # polarChart.createDefaultAxes()


        # 设置 角向轴
        angularAxis = QValueAxis()
        angularAxis.setTickCount(9)
        angularAxis.setLabelFormat("%.2f")
        angularAxis.setShadesVisible(True)
        angularAxis.setShadesBrush(QBrush(QColor(230, 230, 255)))
        polarChart.addAxis(angularAxis, QPolarChart.PolarOrientationAngular)
        angularAxis.setRange(0, 20) # 必须设置范围，否则图表无法显示

        # 设置 径向轴
        radialAxis = QValueAxis()
        radialAxis.setTickCount(5)
        radialAxis.setLabelFormat("%d")
        polarChart.addAxis(radialAxis, QPolarChart.PolarOrientationRadial)
        radialAxis.setRange(0, 10)
        
        chartView.setChart(polarChart)
        chartView.setFocusPolicy(Qt.NoFocus)
        chartView.setRenderHint(QPainter.Antialiasing)

        vbox = QVBoxLayout()
        vbox.addWidget(chartView)
        self.setLayout(vbox)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = MyPolarWindow()
    win.show()
    sys.exit(app.exec_())

曲线极坐标图

import sys
import random
import math

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import Qt
from PyQt5.QtChart import QSplineSeries, QPolarChart, QChart, QChartView, QValueAxis

class MyPolarWindow(QWidget):
    def __init__(self, parent=None):
        super(MyPolarWindow, self).__init__(parent)
        self.setWindowTitle("散点极坐标图")
        # 创建图表
        polarChart = QPolarChart()
        chartView = QChartView()

        # 创建Series
        scatterSeries = QSplineSeries()

        # 添加数据
        for value in range(1, 50):
            scatterSeries.append(value, random.random()*10)
            #scatterSeries.append(QPointF(value, random.random()*10))
        

        scatterSeries.setName("曲线极坐标图")

        polarChart.addSeries(scatterSeries)
        polarChart.setContentsMargins(0, 0, 0, 0)
        polarChart.setTheme(QChart.ChartThemeBlueCerulean)
        # polarChart.createDefaultAxes()


        # 设置 角向轴
        angularAxis = QValueAxis()
        angularAxis.setTickCount(9)
        angularAxis.setLabelFormat("%.2f")
        angularAxis.setShadesVisible(True)
        angularAxis.setShadesBrush(QBrush(QColor(230, 230, 255)))
        polarChart.addAxis(angularAxis, QPolarChart.PolarOrientationAngular)
        angularAxis.setRange(0, 20) # 必须设置范围，否则图表无法显示

        # 设置 径向轴
        radialAxis = QValueAxis()
        radialAxis.setTickCount(5)
        radialAxis.setLabelFormat("%d")
        polarChart.addAxis(radialAxis, QPolarChart.PolarOrientationRadial)
        radialAxis.setRange(0, 10)
        
        chartView.setChart(polarChart)
        chartView.setFocusPolicy(Qt.NoFocus)
        chartView.setRenderHint(QPainter.Antialiasing)

        vbox = QVBoxLayout()
        vbox.addWidget(chartView)
        self.setLayout(vbox)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = MyPolarWindow()
    win.show()
    sys.exit(app.exec_())

区域极坐标图

import sys
import random
import math

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import Qt
from PyQt5.QtChart import QLineSeries, QAreaSeries, QPolarChart, QChart, QChartView, QValueAxis

class MyPolarWindow(QWidget):
    def __init__(self, parent=None):
        super(MyPolarWindow, self).__init__(parent)
        self.setWindowTitle("区域极坐标图")
        # 创建图表
        polarChart = QPolarChart()
        chartView = QChartView()

         # 创建Series
        series0 = QLineSeries()
        series1 = QLineSeries()

        # 添加数据
        series0 << QPointF(1, 5) << QPointF(3, 7) << QPointF(7, 6) << QPointF(9, 7) \
        << QPointF(12, 6) << QPointF(16, 7) << QPointF(18, 5)
        series1 << QPointF(1, 3) << QPointF(3, 4) << QPointF(7, 3) << QPointF(8, 2) \
        << QPointF(12, 3) << QPointF(16, 4) << QPointF(18, 3)

        # 创建区域图
        area = QAreaSeries(series0, series1)
        area.setName("折线极坐标图")

        polarChart.addSeries(area)
        polarChart.setContentsMargins(0, 0, 0, 0)
        polarChart.setTheme(QChart.ChartThemeBlueCerulean)
        # polarChart.createDefaultAxes()


        # 设置 角向轴
        angularAxis = QValueAxis()
        angularAxis.setTickCount(9)
        angularAxis.setLabelFormat("%.2f")
        angularAxis.setShadesVisible(True)
        angularAxis.setShadesBrush(QBrush(QColor(230, 230, 255)))
        polarChart.addAxis(angularAxis, QPolarChart.PolarOrientationAngular)
        angularAxis.setRange(0, 50) # 必须设置范围，否则图表无法显示

        # 设置 径向轴
        radialAxis = QValueAxis()
        radialAxis.setTickCount(5)
        radialAxis.setLabelFormat("%d")
        polarChart.addAxis(radialAxis, QPolarChart.PolarOrientationRadial)
        radialAxis.setRange(0, 20)
        
        chartView.setChart(polarChart)
        chartView.setFocusPolicy(Qt.NoFocus)
        chartView.setRenderHint(QPainter.Antialiasing)

        vbox = QVBoxLayout()
        vbox.addWidget(chartView)
        self.setLayout(vbox)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = MyPolarWindow()
    win.show()
    sys.exit(app.exec_())

以上就是PyQt5+QtChart实现绘制极坐标图的详细内容，更多关于PyQt5 QtChart极坐标图的资料请关注脚本之家其它相关文章！

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