PyQt5+QtChart绘制散点图

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_())

来源：https://blog.csdn.net/songyulong8888/article/details/128329544