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PyQt5+QtChart繪制散點圖

更新時間：2022年12月15日 14:57:16 作者：SongYuLong的博客

QChart是一個QGraphicScene中可以顯示的QGraphicsWidget。本文將利用QtChart實現(xiàn)繪制散點圖，文中的示例代碼講解詳細(xì)，感興趣的小伙伴可以了解一下

PyQt5 QtChart-散點圖

QScatterSeries類將數(shù)據(jù)以散點圖顯示

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("散點圖")
        scatter.setMarkerSize(8)   # 標(biāo)記大小
        # scatter.setMarkerShape(QScatterSeries.MarkerShapeRectangle) #方形標(biāo)記
        scatter.setMarkerShape(QScatterSeries.MarkerShapeCircle) # 圓形標(biāo)記
        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_())

效果圖

補充

除了散點圖，PytQt5和QtChart還可以繪制其他的圖表。下面是小編為大家整理的其他圖表繪制的示例代碼，需要的可以參考一下

PyQt5 QtChart-餅狀圖

QPieSeries類將數(shù)據(jù)以餅狀圖顯示

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("鐵：%10", 1)
        pieSeries.append("鋁：%20", 2)
        pieSeries.append("銅：%70", 7)
        pieSeries.setLabelsVisible()
        pieSeries.setPieSize(0.6)
        
        slice0.setExploded() # 外伸
        slice0.setColor(QColor(255, 0, 150))

        chart.setTitle("餅狀圖")
        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 折線圖

QLineSeries

QLineSeries類將數(shù)據(jù)序列顯示為折線圖，其核心代碼：

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

常用方法：

setPointsVisible(True) ：設(shè)置數(shù)據(jù)點顯示狀態(tài)
setPointLabelsVisible(True)：設(shè)置數(shù)據(jù)點標(biāo)簽顯示狀態(tài)
setPointLabelsFormat(“(@xPoint, @yPoint)”)：設(shè)置數(shù)據(jù)點標(biāo)簽格式
setPointLabelsFont(QFont(None, 8)) ：設(shè)置數(shù)據(jù)點標(biāo)簽字體
setPointLabelsColor(QColor(255, 0,0)) ：設(shè)置數(shù)據(jù)點標(biāo)簽顏色

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("折線圖")

        # 創(chuàng)建圖表 并設(shè)置相關(guān)參數(shù)
        chart = QChart()
        chart.setTitle("隨機折線圖")
        chart.setAnimationOptions(QChart.SeriesAnimations)
        chart.setAnimationDuration(1000)
        chart.setAnimationEasingCurve(QEasingCurve.InOutCirc)
        # chart.setTheme(QChart.ChartThemeBlueCerulean)
        chart.legend().show()


        # 創(chuàng)建折線數(shù)據(jù)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)

        # 創(chuàng)建軸坐標(biāo)
        # chart.createDefaultAxes()  # 創(chuàng)建默認(rèn)軸    
        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_())