Pyqtgraph multiple plots subplots() bottom = np. so p1-p6 in this case are different PlotWidget objects on which I add Items/Plot data, i. Essentially I am trying to put two graphs in a QWidget within the QMainwindow. 4; NumPy version: 1. What I want is to link pe to any of p1-p6!. mkQApp() # Axis a2 = pg. Plots from Matplotlib displayed in PyQt5 are actually rendered as simple (bitmap) images by the Agg backend. rand (10, 10)) layout. pe is an extra plot so the user can choose from those already available/created. clear() You mentioned, that You are adding and removing plots dynamically. plot(xx[plot_num], yy[plot_num]) self. Set range to the plot window 5. 0; Qt Python binding: PyQt5 5. Create a BarGraphItem object to plot the bar graph between the data 5. Dec 21, 2021 · I want to draw a stacked bar chart in pyqtgraph similar to this one, drawn in matplolib: import matplotlib. 3 rows, there are 5 columns only in the first row. plot returns a handle to the plot widget that is created, allowing more data to be added to the same window. arrayToQPath(xdata. flatten(), ydata. widget0. So there are 3 y-axis on the right side now. plots[plot_num] = self. GuiQwt is an interesting project with many advanced features similar to pyqtgraph. Apr 29, 2013 · If you want to be able to lay out the plots from designer, then you'll instead need to create multiple PlotWidgets inside a grid layout. addColorBar(img, colorMap='viridis')`` is a convenient method to assign and show a color map. 16. I want that the code itself recognize how many lines of data it has to plot but currently I don't see any data in PyQtGraph. I am unit testing right now, and I am hav I want to synchronize the X-Axis of several pyqtgraph plots. The FigureCanvasQTAgg class wraps this backend and displays the resulting image on a Qt widget. 3. So far I have each data stream associated with its relevant axis. e horizontal and vertical data 4. 1. setXLink(other_plot) Side notes: I set up two graphs by subclassing pyqtgraph's GraphicsLayoutWidget and adding plots to them individually I'm sure there should be a way of doing it in a single subclass but doing something like self. I want to create two or more axes in one window through pyqtgraph, and draw two lines in one ax. index, df[col], bottom = bottom, label = col) bottom += df[col] ax. For e. examples module Feb 21, 2019 · Multiple updating plot with pyqtgraph in Python. However i tried with the code i have written which is below. In the following example we're going to plot two lines of similar data, using the same line styles, thicknesses etc. transfer([]) # Send new data to the remote process and plot it # We Nov 12, 2013 · Unfortunately I want to plot many many lines and have noticed that as I add more lines to the plot there is an exponential performance decrease that brings the program to its knees before 100,000 lines (although it can cope with 10,000). Oct 12, 2020 · In this tutorial we'll walk through the first steps of creating a plot widget with PyQtGraph and then demonstrate plot customization using line colours, line type, axis labels, background colour and plotting multiple lines. e. It might also be nice Apr 23, 2016 · Since the task is CPU bound, and you're still running on one core (for Python, by default), multi-threading would be of little use. setLayout (layout) im1 = pg. Add and Remove plots to a matplotlib figure. Feb 19, 2024 · Multiple Plot Lines. However my problem is that the Current plot (self. Viewed 14k times Aug 5, 2024 · Line graph is created with the help of plot class in PyQtGraph. addPlot() for n in data: w1. I've seen a few examples regarding multiple axes in one plot but to no avail. AxisItem("left") a4 = pg. Create or get the plotting data i. I want to add 2 axis to the left of the plot. plot(pen='y') # create an empty list in the remote process data = proc. To increase plotting performance, Can I plot multiple channels with different colors in pyqtgraph with ArrayToQPath? path = pg. QWidget win. plot(xx99_new, yy99_new) Jul 31, 2013 · import pyqtgraph as pg pg. So, although multi-threading or Jun 1, 2020 · From what I’ve learned since then, I don’t think a QGraphicsItem can belong to more than one scene (or Pyqtgraph plot) - after all, items have a function scene() which works like parent(). This particular plot appears in the upper left hand corner of the widget, it appears before the LHD axis. The script initializes a graphical window and continuously updates a plot with new data points calculated as the sine of the current index. plot()：创建一个新的绘图窗口来显示数据； PlotWidget. AxisItem("left") Dec 17, 2021 · I would like to draw a pyqtgraph subplot with the following layout:. scroll-wheel while mouse on x-Axis) I want to assign the same changes to Feb 6, 2021 · And you create two separate plots for these two graphs: plot1 = graph1. Plot the line on the plot Aug 18, 2017 · Multiple updating plot with pyqtgraph in Python. PlotItem. Mar 18, 2013 · Is there any possibilty to have multiple Y Axis for a PlotWidget containing different line graphs. pyplot as plt import numpy as np fig, ax = plt. bar(df. y - Y data. _import('pyqtgraph') plotwin = rpg. Qt import QtGui, QtCore Apr 6, 2015 · I have found the MultiplePlotAxes-example in pyqtgraph and extended it with one more y-axis (see code below). In the following example, we plot temperatures values from two different sensors. What I want to do (and can't seem to figure out) is to make multiple graphs inside the one plot widget in my graph tab (I attached a sample of what I'd like to see). You signed out in another tab or window. It is common to have plots that involve more than one dependent variable. QVBoxLayout cw. plot()：将一组新的数据添加到现有的绘图小部件； PlotItem. QMainWindow # container widget with a layout to add QWidgets to cw = QtGui. plot()：将一组新的数据添加到现有的绘图小部件； GraphicsLayout. 5. 1 Qt 5. AxisItem("left") a5 = pg. flatten(), conn. plot(n) or. In PyQtGraph, you can plot multiple variables in a single chart by calling . addPlot() Add a new plot to a grid of plots Like PyQwt, however, Chaco can be challenging to install on a wide variety of platforms and lacks some of pyqtgraph's more advanced features (although pyqtgraph certainly lacks many of Chaco's features as well). plot(data) The last rule generates ValueError: operands could not be broadcast together with shapes (10) (10,120) May 5, 2021 · Bar graph is created with the help of BarGraphItem class in PyQtGraph. Here is my code which I have added an extra plot: """ Demonstrates a way to put multiple axes around a single plot. You signed in with another tab or window. for each, but changing the line colour. addPlot(title="Plot 1") self. setData(x, y) plot2 = graph2. This will force the y-axis axis items to have the same width. Autoscaling y axis to visible data in pyqtgraph. pyqtgraph. Each displays it's own. Apr 29, 2013 · Inside another is a spreadsheet of the data points, inside another is a textview that shows all the stats. I've adapted the example code to demonstrate: # -*- coding: utf-8 -*- """ Demonstrates basic use of LegendItem """ Apr 4, 2020 · import pyqtgraph as pg from pyqtgraph. So far my approach is to create a myplotwidget. Importing the PyQtgraph module 2. It is common for plots to involve more than one line. plot(name = 'plot2') plot2. flatten()) item = QtGui. Now you want to display the plot2 line on a graph1 window. columns: ax. Mar 13, 2025 · Live pyqtgraph plot. show() What is the best practice to plot large arrays? The pyqtgraph examples, although extensive, didn't help me much further import pyqtgraph as pg view = pg. p2) is not in the correct area of the display. The call to pg. plot(name = 'plot1') plot1. In order to plot the bar graph in PyQtGraph we have to do the following 1. pyqtgraph: Multiple y-axis on left side? 0. But the problem is i want the "x-axis/bottom" to be in log mode, so both plots are semilog ones. removeItem(self. So, I think the action here is to switch append to extend and make the check adding an axis item to multiple plots more robust. plot() multiple times on the same PlotWidget instance. < Loading Image > I would like to add a legend to add a legend to this. PyQtGraph stacked plots approach. w1. I am currently achieving this by making two instances of the line, and adding one to each plot. com There are a few basic ways to plot data in pyqtgraph: All of these will accept the same basic arguments which control how the plot data is interpreted and displayed: x - Optional X data; if not specified, then a range of integers will be generated automatically. 0. It is presently based on PyQwt and thus comes with Jul 12, 2017 · I'm using pyqtgraph and I'd like to add an item in the legend for InfiniteLines. The problem here is that when you use: Oct 13, 2016 · pyqtgraph plotwidget multiple Y axis plots in wrong area. Generating and navigating plots with many lines is slow and sluggish. In that case, I would create a list of active plots with reset function. Nov 14, 2016 · I am willing to get 2 random data and plot it in the same Widget using PyQtGraph in a real-time way. Qt import QtGui, QtCore import pyqtgraph as pg pg. This I found out how to do using someones code shown below from pyqtgraph. I want them to show up as Red and Blue dots. When the user rescales the X-Axis with mouse interactions (e. Combining PyQt and Matplotlib. plot() multiple times on the same PlotWidget. setCentralWidget (cw) layout = QtGui. It seems like this Oct 9, 2014 · I want to plot 2 plots on one graph and the code below works nicely (i used the code from the pyqtgraph's author) with a linear axis. These correspond to approximately 3000 plots. Plot controls. However i wanted to add one more plot item in live mode. Real behavior. Fortunately, there are 2 PRs that are attempting to roll out this functionality, #2010 and #1359 If you could give either/both a try and report how well they work for you, that would be really helpful, as we would like to merge this functionality Nov 18, 2014 · Multiple updating plot with pyqtgraph in Python. addPlot(title="Plot 2") Dec 5, 2021 · I'm attempting to plot the same line on two plots in pyqtgraph (pyqt5). """ Demonstrates a way to put multiple axes around a single plot. plot() Add a new set of data to an existing plot widget. ) and second is to provide tools to aid in rapid application development (for example, property trees such as used in Qt Designer). 12 as well; Multiple optimized plot types; Many examples for easy start def addColorBar (self, image, ** kwargs): """ Add a ColorBarItem and set to the provided image. plot() curve = plotwin. For example, if the line is moved (mouse dragged) on one plot, the line on the other plot should move as well. E. GraphicsLayout. But rather than Jul 29, 2021 · I wanted to add plots to GraphicsLayoutWidget. Creating a plot window 3. plot() and then setData() for each of my edge. Instead, create the needed QPen and QBrush objects in advance and pass these as a list instead. These defaults can be changed using pyqtgraph. However, after a hard time, my script does not work Mar 25, 2021 · The way to do it would be to use a GraphicsLayout, have the plots, and x-axis axis items be in one column, and have the y-axis axisitem's be in another column. In PyQtGraph this is as simple as calling . 4; Operating system Nov 24, 2014 · Having a simple graphics layout with PyQtGraph in which the x-axis of the plots are linked together and the grid is displayed in both plots as well: from pyqtgraph. plots[99] = self. A call like ``plot. zeros(len(df)) for col in df. I might have a live view showing a voltage and a current line plot. The plots are time series. setImage (np. I am trying to convert the MultiplePlotAxes. ImageView im1. Re-plotting might be laggy when using high update frequencies and multiple plots. Multiple live plot GUI using pyqtgraph and Hi @vit0l. Tested environment(s) PyQtGraph version: 0. Then You can just add or remove curves from this list and always have consistent method to clear them all. random. QtProcess() rpg = proc. GraphicsLayoutWidget() w1 = view. PlotWidget. Ask Question Asked 10 years, 5 months ago. What should I do? The following code creates multiple windows. 7. 1; Python version: 3. Oct 12, 2020 · Plotting multiple lines. You switched accounts on another tab or window. legend(frameon = True) plt. setConfigOption(): import pyqtgraph as pg ## Switch to using white background and black foreground pg . pen - The pen to use when drawing plot lines, or None to disable lines. By default, pyqtgraph uses a black background for its plots and grey for axes, text, and plot lines. p1. Reload to refresh your session. Sep 7, 2020 · In this case, you don't need to use the same AxisItem instance in all three plots, just create a new AxisItem for each one. Dec 30, 2017 · At the moment I am using matplotlib to plot multiple numpy arrays (or lists) of data. QGraphicsPathItem(path) item. Furthermore, PyQtGraph cannot have any plotting done in multiple threads: everything must be done in the main thread (see the author's response to a similar subject here). However, I think a scene can be viewed in multiple QGraphicsView widgets simultaneously each with its own scaling etc…though I never tried. Sep 24, 2020 · Its primary goals are to provide fast, interactive graphics for displaying data (plots, video, etc. What I try to accomplish is the following: I have a single line that I want plot in a PlotWidget and visualize that line using two differently scaled x axes. All of this works fine right now. I am developing a GUI with PySide where I have a PyQtGraph GraphicsView with multiple plots (see the image below). Make each Y value to correspond to an X value in The example above would open a window displaying a line plot of the data given. Jul 1, 2022 · Plotting multiple lines. Thus the user can select which plot he/she wants to see next to the main plot. 13. py example in pyqtgraph so that the all the axes are on the right side and aligned. Apr 27, 2018 · I am trying to build an application using the PyQt5 and pyqtgraph framework. Dec 20, 2024 · I want to open a window with pyqtgraph alone, without using pyqt. e horizontal and two vertical data for two lines 4. Pyqtgraph multiple horizontal axes. ability to plot multiple x or y axes together and position these on the top, bottom, left or right axes. My problem is that when these lists become too large with a lot of data, matplotlib is very slow. 9, 3. The GUI is designed in Qt Designer, where I promote a Graphics View to a GraphicsLayoutWidget. plots = {} for plot_num in range(200): self. 2. May 24, 2018 · plot. May 8, 2020 · Hi, I'm using PlotWidget to draw hundreds of discontinue edges in my Qt application. The main window also has two GLViewWidgets that are displaying GLMeshItems that are being translated (This is not an issue as it is a constant cost per frame and no matter what, they only moves . But now i wanted to changed i have two types of msgs one in live mode and in other recorded mode. multiprocess as mp proc = mp. 10. plot() Create a new plot window showing your data. Is there a way to get all 3 y-axis from Apr 26, 2022 · A dict of plots would suffice, you want a dict so that when an element is removed, the order isn't lost: self. Qt import QtGui import numpy as np app = pg. mkQApp() # Create remote process with a plot window import pyqtgraph. Ideally, any changes to the line are reflected in both plots. addItem(), etc. Feb 19, 2022 · To clear all plots and legend, You can use: for plot_item in [legend, p1, p2, p3]: plot_item. plot(x,y), p1. Modified 10 years, 4 months ago. Apr 24, 2019 · Each plot object spawns a thread which updates its data but these threads are still within the same main GUI process. Add/Delete plots Jul 14, 2016 · I have a question regarding plotting two x axes in one PlotWidget. setData(a, b) You want have displayed the plot lines on these two graphs. Dec 12, 2020 · I'm trying to plot multiple lines of data from an arduino in PyQtGraph. Fast data visualization and GUI tools for scientific / engineering applications - pyqtgraph/pyqtgraph Feb 28, 2017 · Both windows have multiple graphs and tables displaying real-time data (coming from a queue from another process that is doing all the calculations). addPlot()：添加一个新 Mar 13, 2019 · Pyqtgraph should automatically scale the y-axis on multiple plots with which ever has the largest range. Here's an example widget with auto-scaling plots in PyQt4 but the concept should be the same for PyQt5 . g. This is a frequently requested feature, and it can be done in the library as is, but I'll be the first to admit it's a painful process. plots[99]) self. Graphics View to a GraphicsLayoutWidget. addWidget Jan 22, 2020 · Basic plot with embedded Matplotlib. setConfigOption ( 'foreground' , 'k' ) ## The For scatter plots that use multiple pen or brush settings, passing a list of string representation to symbolPen or symbolBrush creates many internal QPen and QBrush objects. PyQtGraph includes an extensive set of examples which can be accessed by the import pyqtgraph. With Pglive You've got an easy Thread-safe live plot implementation in Pyqt5, Pyqt6 or PySide6; You can use all kwargs that works in pyqtgraph; Use your plots with DataConnector directly; It works with Python3. 10, 3. 11 and 3. Your example should then work without fixing pyqtgraph itself for now. I read that pyqtgraph can plot really fast, but my question is: Nov 17, 2021 · 安装pip3 install pyqtgraph 在PyQtGraph中，有几种绘制图形的方法： pyqtgraph. Following the suggestion from this answer, I wrote this piece of code: Sep 20, 2019 · Both generating and navigating plots with many lines should be as performant as usual in PyQtGraph. mkQApp win = QtGui. AxisItem("left") a3 = pg. Feb 3, 2018 · Voltage on the left axis & Current on the right. See full list on pythonguis. How to plot multiple window at the same time in pyqtgraph for data visualization in same time and update continuously? This repository demonstrate the use of pyqtgraph to create a real-time updating plot. I wonder if someone can help me out. setConfigOption ( 'background' , 'w' ) pg . bjeagiggjguizukgikfugzclsmqdrhdyzjvuhtvppiiojiymkowkjjzoeptoriwjcpqwsflkjzdjz