PyQt5+QtChart绘制散点图

2022-12-15 15:00

短信预约 -IT技能 免费直播动态提醒

PyQt5 QtChart-散点图

QScatterSeries类将数据以散点图显示

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

class MyScatterWindow(QWidget):
    def __init__(self, parent=None):
        super(MyScatterWindow, self).__init__(parent)
        self.resize(800, 600)
        chart = QChart()
        chartView = QChartView()

        print(PYQT_VERSION_STR)

        scatter = QScatterSeries()
        for value in range(1, 500):
            scatter.append(value, random.random()*10)
            #scatter.append(QPointF(value, random.random()*10))

        scatter.setName("散点图")
        scatter.setMarkerSize(8)   # 标记大小
        # scatter.setMarkerShape(QScatterSeries.MarkerShapeRectangle) #方形标记
        scatter.setMarkerShape(QScatterSeries.MarkerShapeCircle) # 圆形标记
        pen = QPen()
        pen.setColor(Qt.red)
        pen.setWidth(2)
        scatter.setPen(pen)    
        
        chart.addSeries(scatter)
        chart.createDefaultAxes()

        chartView.setChart(chart)

        vbox = QVBoxLayout()
        vbox.addWidget(chartView)

        self.setLayout(vbox)

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

效果图

补充

除了散点图，PytQt5和QtChart还可以绘制其他的图表。下面是小编为大家整理的其他图表绘制的示例代码，需要的可以参考一下

PyQt5 QtChart-饼状图

QPieSeries类将数据以饼状图显示

import sys
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import Qt
from PyQt5.QtChart import QPieSeries, QPieLegendMarker, QChart, QChartView

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

        chart = QChart()
        chartView = QChartView()
        pieSeries = QPieSeries()

        slice0 = pieSeries.append("铁：%10", 1)
        pieSeries.append("铝：%20", 2)
        pieSeries.append("铜：%70", 7)
        pieSeries.setLabelsVisible()
        pieSeries.setPieSize(0.6)
        
        slice0.setExploded() # 外伸
        slice0.setColor(QColor(255, 0, 150))

        chart.setTitle("饼状图")
        chart.addSeries(pieSeries)
        
        chartView.setChart(chart)
        chartView.setRenderHint(QPainter.Antialiasing)

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

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

PyQt5 QtChart-QLineSeries 折线图

QLineSeries

QLineSeries类将数据序列显示为折线图，其核心代码：

lineSeries = QLineSeries()
lineSeries.append(1, 3)
lineSeries.append(5, 8)
…
chart.addSeries(lineSeries)

常用方法：

setPointsVisible(True) ：设置数据点显示状态
setPointLabelsVisible(True)：设置数据点标签显示状态
setPointLabelsFormat(“(@xPoint, @yPoint)”)：设置数据点标签格式
setPointLabelsFont(QFont(None, 8)) ：设置数据点标签字体
setPointLabelsColor(QColor(255, 0,0)) ：设置数据点标签颜色

import sys
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtChart import *

import random

class MyWaveWindow(QWidget):
    def __init__(self, parent=None):
        super(MyWaveWindow, self).__init__(parent)
        self.setWindowTitle("折线图")

        # 创建图表 并设置相关参数
        chart = QChart()
        chart.setTitle("随机折线图")
        chart.setAnimationOptions(QChart.SeriesAnimations)
        chart.setAnimationDuration(1000)
        chart.setAnimationEasingCurve(QEasingCurve.InOutCirc)
        # chart.setTheme(QChart.ChartThemeBlueCerulean)
        chart.legend().show()


        # 创建折线数据序列
        lineSeries = QLineSeries()
        for value in range(0, 100):
            lineSeries.append(value, round(random.random()*10, 2))

            
        lineSeries.setPointsVisible(True)
        lineSeries.setPointLabelsVisible(True)
        lineSeries.setPointLabelsFormat("(@xPoint, @yPoint)")
        lineSeries.setPointLabelsFont(QFont(None, 8))
        lineSeries.setPointLabelsColor(QColor(255, 0, 0))
        chart.addSeries(lineSeries)

        # 创建轴坐标
        # chart.createDefaultAxes()  # 创建默认轴    
        axis_x = QValueAxis()
        axis_x.setLabelFormat("%d")
        axis_x.setMinorTickCount(3)
        axis_x.setRange(0, 100)
        chart.addAxis(axis_x, Qt.AlignBottom)
        lineSeries.attachAxis(axis_x)

        axis_y = QValueAxis()
        axis_y.setLabelFormat("%d")
        # axis_y.setTickType(QValueAxis.TicksDynamic)
        axis_y.setTickCount(20)
        axis_y.setMinorTickCount(3)
        axis_y.setRange(0, 10)
        chart.addAxis(axis_y, Qt.AlignLeft)
        lineSeries.attachAxis(axis_y)

            
        chartView = QChartView(chart)
        chartView.setRenderHint(QPainter.Antialiasing)

        layout = QVBoxLayout()
        layout.addWidget(chartView)
        self.setLayout(layout)
        self.resize(800, 600)
        

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