pyqtgraph

I used the "scrolling graph" example from pyqtgraph.examples as template to create a plot, which shows a continuous sinus wave. Now, I would like to use buttons to change the amplitude of the sinus wave. This is why I used another structure (see the code below). This doesn't work, it only plots a static sinus wave. How can I use my update function to plot the continuous sinus wave? How can I chage the amplitude by using the buttons? I have already checked this and this without success. import sys from PyQt4 import QtGui, QtCore import numpy as np import pyqtgraph as pg class sinus_wave(QtGui

first of all I hope you have me some patience since I'm new on these kind of projects and I also hope not to be asking dumb questions. That being said, my main objective is to create a UI for a raspberry pi 3 which will sense voltage, current, etc from a battery and from a solar panel. Since I'm working on a raspberry and have some knowledge on Python3, I decided to use QTCreator which as I understand can be translated into python3 through pyqt ( https://nikolak.com/pyqt-qt-designer-getting-started/ ). I installed it on my raspberry pi and made the following UI: after having a basic UI, I

I have found the MultiplePlotAxes-example in pyqtgraph and extended it with one more y-axis (see code below). So there are 3 y-axis on the right side now. Is there a way to get all 3 y-axis from the right side to the left side so that there are in total 4 y-axis on the left side?: Because for example ax3 = pg.AxisItem('left') only changes the orientation of the label and ticks of an axis but not the position of the axis relative to the origin of co-ordinates. modifed MultiplePlotAxes-example import pyqtgraph as pg from pyqtgraph.Qt import QtCore, QtGui import numpy as np pg.mkQApp() pw = pg

I am working on a project where I will have to analyse signals coming from a device. I have a library working which gets me data from the device. As of now, I am collecting the data and then plotting it. I am interested in building a live data monitor which can plot a graph in real time. Upon searching, I figured out PyQtGraph is ideal for the task. I am not familiar with Qt, so I am looking for examples which I can modify to my needs. Some examples given in PyQtGraph docs update the plot real-time BUT I need something like a live monitor- where the graph is moving towards the right as it

pyqtgraph官方给的示例居然会报错2333 官方文档传送门： #####pyqtgraph export pyqtgraph支持在可视化窗口中右键保存（Exporting from the GUI）试了一下只能保存为svg格式， 保存为png会闪退不知道是我这里的原因还是这里有bug，我希望直接生成图片（Exporting from the API） 先查看本地site-packages里面有test文件，里面有生成svg的版本画出来的图是svg格式只能放在浏览器看不能改后缀名 而我希望生成png之类的图片 折腾了一下终于弄了一个能跑的出来： from __future__ import division, print_function, absolute_import import pyqtgraph as pg import pyqtgraph.exporters import numpy as np def test_plotscene(): pg.setConfigOption( ‘ foreground ‘ , (255,255,255 )) w = pg.GraphicsWindow() p = w.addPlot() p.plot(np.linspace( 0.0, 20.0, 20), pen={ ‘ color ‘ : ‘ w ‘ }) p

I don't konw if my method is the right method, but it works. class PltItem(pg.PlotItem): pltClicked = Signal() def __init__(self, parent = None): super(PltItem, self).__init__(parent) def mousePressEvent(self, ev): super(PltItem, self).mousePressEvent(ev) self.pltClicked.emit() the in the main window i use for i, plt in enumerate(self.plts): self.connect(plt, SIGNAL("pltClicked()"), partial(self.selectplot, i)) def selectplot(self, i): ... Your solution is a good one. Another solution is to connect to the GraphicsScene.sigMouseClicked signal and use QGraphicsScene.items() to determine whether

I made a program that receives every transaction information of crude oil futures in real time. Basically, OnReceiveRealData executes when a transaction is executed and calls real_get method. In the method, current time, price and volume data are collected and a dictionary is made with them. There are more methods to make OHLC format data from this real time streaming data, but the point of my question is how to update a custom graphic item(a candlestick plot) whenever real_get method is called? class COM_Receiver(QAxWidget): def __init__(self): super().__init__() self._create_com_instance()