Some QtCharts examples converted to PyQt: https://doc.qt.io/qt-5/qtcharts-examples.html

qtcharts-nesteddonuts-example.py

# from: https://doc.qt.io/qt-5/qtcharts-nesteddonuts-example.html
import functools
import random

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

class Widget(QWidget):

    def __init__(self):
        super().__init__()
        self.setMinimumSize(800, 600)

        self.m_donuts = []

        self.chartView = QChartView()
        self.chartView.setRenderHint(QPainter.Antialiasing)
        self.chart = self.chartView.chart()
        self.chart.legend().setVisible(False)
        self.chart.setTitle("Nested donuts demo")
        self.chart.setAnimationOptions(QChart.AllAnimations)

        minSize = 0.1
        maxSize = 0.9
        donutCount = 5

        for i in range(donutCount):
            donut = QPieSeries()
            sliceCount = random.randrange(3, 6)
            for j in range(sliceCount):
                value = random.randrange(100, 200)
                slice_ = QPieSlice(str(value), value)
                slice_.setLabelVisible(True)
                slice_.setLabelColor(Qt.white)
                slice_.setLabelPosition(QPieSlice.LabelInsideTangential)
                slice_.hovered[bool].connect(functools.partial(self.explodeSlice, slice_=slice_))
                donut.append(slice_)
                donut.setHoleSize(minSize + i * (maxSize - minSize) / donutCount)
                donut.setPieSize(minSize + (i + 1) * (maxSize - minSize) / donutCount)

            self.m_donuts.append(donut)
            self.chartView.chart().addSeries(donut)


        # create main layout
        self.mainLayout = QGridLayout(self)
        self.mainLayout.addWidget(self.chartView, 1, 1)
        self.chartView.show()
        self.setLayout(self.mainLayout)

        self.updateTimer = QTimer(self)
        self.updateTimer.timeout.connect(self.updateRotation)
        self.updateTimer.start(1250)


    def updateRotation(self):
        for donut in self.m_donuts:
            phaseShift =  random.randrange(-50, 100)
            donut.setPieStartAngle(donut.pieStartAngle() + phaseShift)
            donut.setPieEndAngle(donut.pieEndAngle() + phaseShift)


    def explodeSlice(self, exploded, slice_):
        if exploded:
            self.updateTimer.stop()
            sliceStartAngle = slice_.startAngle()
            sliceEndAngle = slice_.startAngle() + slice_.angleSpan()

            donut = slice_.series()
            seriesIndex = self.m_donuts.index(donut)
            for i in range(seriesIndex + 1, len(self.m_donuts)):
                self.m_donuts[i].setPieStartAngle(sliceEndAngle)
                self.m_donuts[i].setPieEndAngle(360 + sliceStartAngle)
        else:
            for donut in self.m_donuts:
                donut.setPieStartAngle(0)
                donut.setPieEndAngle(360)
            self.updateTimer.start()
        slice_.setExploded(exploded)


a = QApplication([])
w = Widget()
w.show()
a.exec_()

qtcharts-percentbarchart-example.py

# from: https://doc.qt.io/qt-5/qtcharts-percentbarchart-example.html
from PyQt5.QtChart import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *

a = QApplication([])

set0 = QBarSet("Jane")
set1 = QBarSet("John")
set2 = QBarSet("Axel")
set3 = QBarSet("Mary")
set4 = QBarSet("Samantha")

set0 << 1 << 2 << 3 << 4 << 5 << 6
set1 << 5 << 0 << 0 << 4 << 0 << 7
set2 << 3 << 5 << 8 << 13 << 8 << 5
set3 << 5 << 6 << 7 << 3 << 4 << 5
set4 << 9 << 7 << 5 << 3 << 1 << 2

series = QPercentBarSeries()
series.append(set0)
series.append(set1)
series.append(set2)
series.append(set3)
series.append(set4)

chart = QChart()
chart.addSeries(series)
chart.setTitle("Simple percentbarchart example")
chart.setAnimationOptions(QChart.SeriesAnimations)

categories = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"]
axis = QBarCategoryAxis()
axis.append(categories)
chart.createDefaultAxes()
chart.setAxisX(axis, series)

chart.legend().setVisible(True)
chart.legend().setAlignment(Qt.AlignBottom)

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

window = QMainWindow()
window.setCentralWidget(chartView)
window.resize(420, 300)
window.show()

a.exec_()

qtcharts-temperaturerecords-example.py

# from https://doc.qt.io/qt-5/qtcharts-temperaturerecords-example.html
from PyQt5.QtChart import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *


a = QApplication([])

low = QBarSet("Min")
high = QBarSet("Max")

low << -52 << -50 << -45.3 << -37.0 << -25.6 << -8.0 << -6.0 << -11.8 << -19.7 << -32.8 << -43.0 << -48.0
high << 11.9 << 12.8 << 18.5 << 26.5 << 32.0 << 34.8 << 38.2 << 34.8 << 29.8 << 20.4 << 15.1 << 11.8

series = QStackedBarSeries()
series.append(low)
series.append(high)

chart = QChart()
chart.addSeries(series)
chart.setTitle("Temperature records in celcius")
chart.setAnimationOptions(QChart.SeriesAnimations)

categories = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]

axis = QBarCategoryAxis()
axis.append(categories)
axis.setTitleText("Month")
chart.createDefaultAxes()
chart.setAxisX(axis, series)
chart.axisY(series).setRange(-52, 52)
chart.axisY(series).setTitleText("Temperature [&degC]")

chart.legend().setVisible(True)
chart.legend().setAlignment(Qt.AlignBottom)

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

window = QMainWindow()
window.setCentralWidget(chartView)
window.resize(600, 300)
window.show()

a.exec_()

I am trying to create and update bar graph dynamically. I am able to create the graph, but getting the below error when trying to update it dynamically.
Graph is created using QChart. Getting the below error for all the data that is coming from the port and display the graph at the end without any dynamic update. Error says Can not add series. Series already on the chart.

show the code, what version windows, pyqt are You using, Can you test with pyside2.?

hi. great examples. Is it possible to have a subfunction in order to refresh data? For example: I have a chart with yearly data. I want to update the chart data when I change the item in combobox which include years(2019,2020,2021).

hi, David, I dont k nokw what library are you using to chart. Here i put a example how to do chart in matplotlib from csv data. You can Choose what column is axis x, and what columns do yuu whish put in chart. Review. And tell me if that adjust to you need. JJGM On Sunday, November 14, 2021, 09:56:02 AM GMT-5, David ***@***.***> wrote: @hwarang098tkd commented on this gist. hi. great examples. Is it possible to have a subfunction in order to refresh data? For example: I have a chart with yearly data. I want to update the chart data when I change the item in combobox which include years(2019,2020,2021). — You are receiving this because you commented. Reply to this email directly, view it on GitHub, or unsubscribe. Triage notifications on the go with GitHub Mobile for iOS or Android.

I use QtChart as your examples.

    def chart_one_create(self):
        result_oneYear = login_query.connection.login_chart_oneYear(self, widgets.user_tb.text(), widgets.pass_tb.text(), widgets.chart_years_ccb.currentText()) ## just a sql query that brings me the data, it works.
        self.set_tkf = QBarSet("TAEKWON-DO")
        self.set_fenc = QBarSet("ΞΙΦΑΣΚΙΑ")
        self.set_oplo = QBarSet("ΟΠΛΟΜΑΧΙΑ")
        self.set_spends = QBarSet("ΕΞΟΔΑ")

        for i in range(len(result_oneYear[0])): #modify my sieries .
            if result_oneYear[1][i][0] is None:
                tkd = 0
            else:
                tkd = result_oneYear[1][i][0]
            self.set_tkf.append(tkd)
            if result_oneYear[1][i][1] is None:
                fenc = 0
            else:
                fenc = result_oneYear[1][i][1]
            self.set_fenc.append(fenc)
            if result_oneYear[1][i][2] is None:
                oplo = 0
            else:
                oplo = result_oneYear[1][i][2]
            self.set_oplo.append(oplo)
            if result_oneYear[1][i][3] is None:
                spen = 0
            else:
                spen = result_oneYear[1][i][3]
            self.set_spends.append(spen)

        self.series = QBarSeries()
        self.series.append(self.set_tkf)
        self.series.append(self.set_fenc)
        self.series.append(self.set_oplo)
        self.series.append(self.set_spends)

        self.categories = result_oneYear[0]
        self.chart = QChart()
        self.chart.addSeries(self.series)
        self.chart.setTitle("![chart_example](https://user-images.githubusercontent.com/28574054/141689303-ebcb896d-70ca-4780-9013-b1efd490a116.jpg)")
        self.chart.setAnimationOptions(QChart.AllAnimations)
        self.chart.setTheme(QChart.ChartThemeBrownSand)
        self.chart.setBackgroundBrush(QBrush(QColor("transparent")))

        axis = QBarCategoryAxis()
        axis.append(self.categories)
        self.chart.createDefaultAxes()
        self.chart.setAxisX(axis, self.series)

        self.chartview = QChartView(self.chart)
        vbox = QGridLayout(widgets.chart_one_fm)
        vbox.setContentsMargins(0, 0, 0, 0)
        vbox.addWidget(self.chartview)
        self.update_chart_one()

    def update_chart_one(self):
        self.series.clear()
        ???????????????????????

As you can see i have a functional QtChart in my ui and works fine at start up. My problem is when i change the combobox item. I cant figure how to update the data in this chart. I trigger with success my def chart_one_create(self).
thnx

.

Hi... In the example.. If you see... there is a pushbutton,, first you need take data from combox, then push buttonm to graph. In your app, you need insert a pushbutton, because  you need update chart when you change the period time. On Sunday, November 14, 2021, 11:25:59 AM GMT-5, David ***@***.***> wrote: @hwarang098tkd commented on this gist. I use QtChart as your examples. def chart_one_create(self): result_oneYear = login_query.connection.login_chart_oneYear(self, widgets.user_tb.text(), widgets.pass_tb.text(), widgets.chart_years_ccb.currentText()) ## just a sql query that brings me the data, it works. self.set_tkf = QBarSet("TAEKWON-DO") self.set_fenc = QBarSet("ΞΙΦΑΣΚΙΑ") self.set_oplo = QBarSet("ΟΠΛΟΜΑΧΙΑ") self.set_spends = QBarSet("ΕΞΟΔΑ") for i in range(len(result_oneYear[0])): #modify my sieries . if result_oneYear[1][i][0] is None: tkd = 0 else: tkd = result_oneYear[1][i][0] self.set_tkf.append(tkd) if result_oneYear[1][i][1] is None: fenc = 0 else: fenc = result_oneYear[1][i][1] self.set_fenc.append(fenc) if result_oneYear[1][i][2] is None: oplo = 0 else: oplo = result_oneYear[1][i][2] self.set_oplo.append(oplo) if result_oneYear[1][i][3] is None: spen = 0 else: spen = result_oneYear[1][i][3] self.set_spends.append(spen) self.series = QBarSeries() self.series.append(self.set_tkf) self.series.append(self.set_fenc) self.series.append(self.set_oplo) self.series.append(self.set_spends) self.categories = result_oneYear[0] self.chart = QChart() self.chart.addSeries(self.series) self.chart.setTitle("") self.chart.setAnimationOptions(QChart.AllAnimations) self.chart.setTheme(QChart.ChartThemeBrownSand) self.chart.setBackgroundBrush(QBrush(QColor("transparent"))) axis = QBarCategoryAxis() axis.append(self.categories) self.chart.createDefaultAxes() self.chart.setAxisX(axis, self.series) self.chartview = QChartView(self.chart) vbox = QGridLayout(widgets.chart_one_fm) vbox.setContentsMargins(0, 0, 0, 0) vbox.addWidget(self.chartview) self.update_chart_one() def update_chart_one(self): self.series.clear() ??????????????????????? As you can see i have a functional QtChart in my ui and works fine at start up. My problem is when i change the combobox item. I cant figure how to update the data in this chart. I trigger with success my def chart_one_create(self). thnx . — You are receiving this because you commented. Reply to this email directly, view it on GitHub, or unsubscribe. Triage notifications on the go with GitHub Mobile for iOS or Android.