pyqtgraph

问题 I got the following code for Python GUI. I found I cannot update the data running in the main window to the pop-up window. In this example I use some random data to mimic the video frames and use a timer to update the data (the updateData() funciton). I want to see the green curve in the pop-up window changes... But I cannot find an effective way to pass the changing data to the pop-up window. Should I use the pyqtSignal() to define a custom signal? I read this page. Should I define the

问题 I am trying to get the (x,y) values of my random function plot whenever I move the moused on top of the graph. I am using pyqtgraph.SignalProxy and connect it to a callback mousedMoved. I am getting this as error: NameError: global name 'mouseMoved' is not defined Here is the code: import sys from pyqtgraph.Qt import QtGui, QtCore import numpy as np import pyqtgraph as pg import time import random class TestClass(QtGui.QMainWindow): ##################################################### def _

问题 I am trying to get the (x,y) values of my random function plot whenever I move the moused on top of the graph. I am using pyqtgraph.SignalProxy and connect it to a callback mousedMoved. I am getting this as error: NameError: global name 'mouseMoved' is not defined Here is the code: import sys from pyqtgraph.Qt import QtGui, QtCore import numpy as np import pyqtgraph as pg import time import random class TestClass(QtGui.QMainWindow): ##################################################### def _

问题 I am trying to have a user interface using PyQt5 and pyqtgraph. I made two checkboxes and whenever I select them I want to plot one of the two data sets available in the code and whenever I deselect a button I want it to clear the corresponding curve. There are two checkboxes with texts A1 and A2 and each of them plot one set of data. I have two issues: 1- If I select A1 it plots the data associated with A1 and as long as I do not select A2 , by deselecting A1 I can clear the data associated

问题 this is a bit longer, the first part is just a description of the problem, the second one the question if my "fix" is correct. I started with python programming. I created a program that communicates with an Arduino that reads the temperature of a furnace of our melting lab. The temperature is then used in a PID algorithm and an output is set to the Arduino. The communication is done via pyserial. So far, everthing works, including live plotting of the temperature signals, PID-variables and

问题 I am trying to move from matplotlib to plotting with pyqtgraph because of its touted capabilities to render and save images faster. In my attempts to do this on a cluster with multiprocessors, I run into the following trouble: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-user' qt.qpa.screen: QXcbConnection: Could not connect to display Could not connect to any X display. How do I obviate displaying a plot, and save it directly to file? Here's my attempt at the code:

问题 I am trying to move from matplotlib to plotting with pyqtgraph because of its touted capabilities to render and save images faster. In my attempts to do this on a cluster with multiprocessors, I run into the following trouble: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-user' qt.qpa.screen: QXcbConnection: Could not connect to display Could not connect to any X display. How do I obviate displaying a plot, and save it directly to file? Here's my attempt at the code:

问题 I'm using pyqtgraph to plot a huge number of data that I receive from sensors. To do so, I made one thread that acquire the data and put in a queue. To plot the data, I check periodically with a timer if the queue is not empty. The problem is that the accuracy of the timer (QTimer) seems to be really bad. I mean when the load is low (sleep for 1000/100 ms) in the measuring thread, the accuracy is pretty good but when the load increase (sleep for 10ms), my update function used to plot data is

问题 I am currently using pyqtgraph to visualize realtime data for 64 independent data traces/plots. While the speed is realtively good, I noticed a serious slow down if the sample buffer length reaches beyond 2000 points. Profiling the following code yields that functions.py:1440(arrayToQPath) seems to have a major impact: import numpy import cProfile import logging import pyqtgraph as pg from PyQt5 import QtCore,uic from PyQt5.QtGui import * from PyQt5.QtCore import QRect, QTimer def program

问题 I have multiple cameras that are hooked up wirelessly via wifi and I'm trying to stream the data to a client, which displays the streams on a GUI. My issue is that the pyqtgraph ImageItems seem to stop repainting after about 30 seconds, or if I click out of the window, or if I adjust the controls on one of the images. After that, I can manage to get the images to repaint by resizing the window, but that's kind of tedious. I thought maybe pyqtgraph wasn't threadsafe, but I don't even know if I