Pyqtgraph multiple plots.
Pyqtgraph multiple plots It is common to have plots that involve more than one dependent variable. Mar 13, 2025 · Live pyqtgraph plot. rand (10, 10)) layout. 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. PyQtGraph stacked plots approach. 2. In PyQtGraph, you can plot multiple variables in a single chart by calling . addColorBar(img, colorMap='viridis')`` is a convenient method to assign and show a color map. May 24, 2018 · plot. multiprocess as mp proc = mp. plot(pen='y') # create an empty list in the remote process data = proc. 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. Apr 24, 2019 · Each plot object spawns a thread which updates its data but these threads are still within the same main GUI process. These correspond to approximately 3000 plots. for each, but changing the line colour. This I found out how to do using someones code shown below from pyqtgraph. 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. ability to plot multiple x or y axes together and position these on the top, bottom, left or right axes. 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 . 3 rows, there are 5 columns only in the first row. Plots from Matplotlib displayed in PyQt5 are actually rendered as simple (bitmap) images by the Agg backend. This will force the y-axis axis items to have the same width. setConfigOption ( 'background' , 'w' ) pg . plots = {} for plot_num in range(200): self. Importing the PyQtgraph module 2. To increase plotting performance, Can I plot multiple channels with different colors in pyqtgraph with ArrayToQPath? path = pg. A call like ``plot. plots[plot_num] = self. Viewed 14k times Aug 5, 2024 · Line graph is created with the help of plot class in PyQtGraph. I am unit testing right now, and I am hav I want to synchronize the X-Axis of several pyqtgraph plots. But now i wanted to changed i have two types of msgs one in live mode and in other recorded mode. Dec 12, 2020 · I'm trying to plot multiple lines of data from an arduino in PyQtGraph. py example in pyqtgraph so that the all the axes are on the right side and aligned. I want them to show up as Red and Blue dots. I am developing a GUI with PySide where I have a PyQtGraph GraphicsView with multiple plots (see the image below). setLayout (layout) im1 = pg. 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. Add/Delete plots Jul 14, 2016 · I have a question regarding plotting two x axes in one PlotWidget. 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. mkQApp() # Create remote process with a plot window import pyqtgraph. _import('pyqtgraph') plotwin = rpg. e horizontal and two vertical data for two lines 4. 1 Qt 5. Pyqtgraph multiple horizontal axes. Create a BarGraphItem object to plot the bar graph between the data 5. e. Apr 29, 2013 · Inside another is a spreadsheet of the data points, inside another is a textview that shows all the stats. Dec 20, 2024 · I want to open a window with pyqtgraph alone, without using pyqt. 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(). 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. 5. plot()：将一组新的数据添加到现有的绘图小部件； GraphicsLayout. w1. 1. Oct 12, 2020 · Plotting multiple lines. What I want is to link pe to any of p1-p6!. GraphicsLayoutWidget() w1 = view. All of this works fine right now. Dec 30, 2017 · At the moment I am using matplotlib to plot multiple numpy arrays (or lists) of data. plot(n) or. < Loading Image > I would like to add a legend to add a legend to this. What should I do? The following code creates multiple windows. addPlot(title="Plot 1") self. You signed out in another tab or window. AxisItem("left") a4 = pg. PyQtGraph includes an extensive set of examples which can be accessed by the import pyqtgraph. plot(x,y), p1. setData(a, b) You want have displayed the plot lines on these two graphs. Add and Remove plots to a matplotlib figure. plots[99] = self. In the following example we're going to plot two lines of similar data, using the same line styles, thicknesses etc. 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. ) and second is to provide tools to aid in rapid application development (for example, property trees such as used in Qt Designer). PlotWidget. Reload to refresh your session. I've seen a few examples regarding multiple axes in one plot but to no avail. g. Qt import QtGui, QtCore import pyqtgraph as pg pg. Mar 18, 2013 · Is there any possibilty to have multiple Y Axis for a PlotWidget containing different line graphs. QWidget win. 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. p2) is not in the correct area of the display. 1; Python version: 3. plot() and then setData() for each of my edge. 3. Graphics View to a GraphicsLayoutWidget. So far my approach is to create a myplotwidget. In PyQtGraph this is as simple as calling . Feb 19, 2024 · Multiple Plot Lines. Here's an example widget with auto-scaling plots in PyQt4 but the concept should be the same for PyQt5 . plot()：创建一个新的绘图窗口来显示数据； PlotWidget. Creating a plot window 3. In that case, I would create a list of active plots with reset function. bar(df. 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. In order to plot the bar graph in PyQtGraph we have to do the following 1. Set range to the plot window 5. 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. setConfigOption(): import pyqtgraph as pg ## Switch to using white background and black foreground pg . It is common for plots to involve more than one line. 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. plot() multiple times on the same PlotWidget instance. pyqtgraph: Multiple y-axis on left side? 0. widget0. Feb 19, 2022 · To clear all plots and legend, You can use: for plot_item in [legend, p1, p2, p3]: plot_item. """ Demonstrates a way to put multiple axes around a single plot. examples module Feb 21, 2019 · Multiple updating plot with pyqtgraph in Python. plot(name = 'plot2') plot2. See full list on pythonguis. However i tried with the code i have written which is below. 10, 3. plot() curve = plotwin. legend(frameon = True) plt. QtProcess() rpg = proc. random. arrayToQPath(xdata. However my problem is that the Current plot (self. plot(xx[plot_num], yy[plot_num]) self. 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. mkQApp win = QtGui. AxisItem("left") a3 = pg. However, I think a scene can be viewed in multiple QGraphicsView widgets simultaneously each with its own scaling etc…though I never tried. 11 and 3. setCentralWidget (cw) layout = QtGui. GuiQwt is an interesting project with many advanced features similar to pyqtgraph. setImage (np. index, df[col], bottom = bottom, label = col) bottom += df[col] ax. zeros(len(df)) for col in df. 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). mkQApp() # Axis a2 = pg. plot() Create a new plot window showing your data. Plot controls. I want to add 2 axis to the left of the plot. QMainWindow # container widget with a layout to add QWidgets to cw = QtGui. clear() You mentioned, that You are adding and removing plots dynamically. QGraphicsPathItem(path) item. Modified 10 years, 4 months ago. so p1-p6 in this case are different PlotWidget objects on which I add Items/Plot data, i. So far I have each data stream associated with its relevant axis. 7. plot()：将一组新的数据添加到现有的绘图小部件； PlotItem. Sep 24, 2020 · Its primary goals are to provide fast, interactive graphics for displaying data (plots, video, etc. Combining PyQt and Matplotlib. 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). Qt import QtGui import numpy as np app = pg. AxisItem("left") Dec 17, 2021 · I would like to draw a pyqtgraph subplot with the following layout:. May 8, 2020 · Hi, I'm using PlotWidget to draw hundreds of discontinue edges in my Qt application. Essentially I am trying to put two graphs in a QWidget within the QMainwindow. flatten()) item = QtGui. The FigureCanvasQTAgg class wraps this backend and displays the resulting image on a Qt widget. But the problem is i want the "x-axis/bottom" to be in log mode, so both plots are semilog ones. 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. AxisItem("left") a5 = pg. y - Y data. 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. pyplot as plt import numpy as np fig, ax = plt. Apr 27, 2018 · I am trying to build an application using the PyQt5 and pyqtgraph framework. I wonder if someone can help me out. The script initializes a graphical window and continuously updates a plot with new data points calculated as the sine of the current index. This particular plot appears in the upper left hand corner of the widget, it appears before the LHD axis. E. 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. Dec 21, 2021 · I want to draw a stacked bar chart in pyqtgraph similar to this one, drawn in matplolib: import matplotlib. flatten(), ydata. plot() Add a new set of data to an existing plot widget. 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. 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). 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. plot() multiple times on the same PlotWidget. When the user rescales the X-Axis with mouse interactions (e. Autoscaling y axis to visible data in pyqtgraph. 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. 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. plot(xx99_new, yy99_new) Jul 31, 2013 · import pyqtgraph as pg pg. Ask Question Asked 10 years, 5 months ago. 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. But rather than Jul 29, 2021 · I wanted to add plots to GraphicsLayoutWidget. 9, 3. Your example should then work without fixing pyqtgraph itself for now. 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. You signed in with another tab or window. Now you want to display the plot2 line on a graph1 window. Jul 1, 2022 · Plotting multiple lines. The plots are time series. 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). columns: ax. Plot the line on the plot Aug 18, 2017 · Multiple updating plot with pyqtgraph in Python. flatten(), conn. Then You can just add or remove curves from this list and always have consistent method to clear them all. 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. plot(name = 'plot1') plot1. Here is my code which I have added an extra plot: """ Demonstrates a way to put multiple axes around a single plot. pe is an extra plot so the user can choose from those already available/created. PlotItem. 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). Tested environment(s) PyQtGraph version: 0. 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. Instead, create the needed QPen and QBrush objects in advance and pass these as a list instead. 16. 13. GraphicsLayout. 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. The GUI is designed in Qt Designer, where I promote a Graphics View to a GraphicsLayoutWidget. These defaults can be changed using pyqtgraph. In the following example, we plot temperatures values from two different sensors. pen - The pen to use when drawing plot lines, or None to disable lines. My problem is that when these lists become too large with a lot of data, matplotlib is very slow. 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. 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. 0; Qt Python binding: PyQt5 5. 10. e horizontal and vertical data 4. Thus the user can select which plot he/she wants to see next to the main plot. The problem here is that when you use: Oct 13, 2016 · pyqtgraph plotwidget multiple Y axis plots in wrong area. 0. I want to create two or more axes in one window through pyqtgraph, and draw two lines in one ax. QVBoxLayout cw. ImageView im1. plot returns a handle to the plot widget that is created, allowing more data to be added to the same window. addWidget Jan 22, 2020 · Basic plot with embedded Matplotlib. I am trying to convert the MultiplePlotAxes. You switched accounts on another tab or window. Create or get the plotting data i. p1. Ideally, any changes to the line are reflected in both plots. I am currently achieving this by making two instances of the line, and adding one to each plot. Generating and navigating plots with many lines is slow and sluggish. So there are 3 y-axis on the right side now. subplots() bottom = np. However i wanted to add one more plot item in live mode. plots[99]) self. Each displays it's own. addItem(), etc. 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). By default, pyqtgraph uses a black background for its plots and grey for axes, text, and plot lines. 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. 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. Real behavior. 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. 4; NumPy version: 1. The call to pg. For e. Multiple live plot GUI using pyqtgraph and Hi @vit0l. pyqtgraph. For example, if the line is moved (mouse dragged) on one plot, the line on the other plot should move as well. removeItem(self. addPlot() for n in data: w1. Re-plotting might be laggy when using high update frequencies and multiple plots. I might have a live view showing a voltage and a current line plot. Feb 3, 2018 · Voltage on the left axis & Current on the right. addPlot(title="Plot 2") Dec 5, 2021 · I'm attempting to plot the same line on two plots in pyqtgraph (pyqt5). setData(x, y) plot2 = graph2. hyqgdlj jvpzb adago gzcj skvm pkmblp isweyo ygaf qupa bqatr fauzi yvbmz ajxhl cvti ezeafe