PyQtGraph – Hide the Bar Graph - GeeksforGeeks

25 Sep, 2020
In this article we will see how we can hide the bar graph in the PyQtGraph module. PyQtGraph is a graphics and user interface library for Python that provides functionality commonly required in designing and science applications. Its primary goals are to provide fast, interactive graphics for displaying data (plots, video, etc.) and second is to provide tools to aid in rapid application development (for example, property trees such as used in Qt Designer).A bar chart or bar graph is a chart or graph that presents categorical data with rectangular bars with heights or lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally. A vertical bar chart is sometimes called a column chart. Hiding bar graph doesn’t mean that it will get deleted. It means that it will not get displayed on the plot window.
We can create a plot window and bar graph with the help of commands given below
# creating a pyqtgraph plot window
window = pg.plot()

# creating a bar graph of green color
bargraph = pg.BarGraphItem(x=x, height=y1, width=0.6, brush='g')

In order to do this we use hide method with the bar graph object
Syntax : bargraph.hide()
Argument : It takes no argument
Return : It returns None
Below is the implementation
# importing QtGui to use QIconfrom PyQt5.QtGui import * from PyQt5.QtCore import Qt   # importing pyqtgraph as pgimport pyqtgraph as pg  # importing QtCore and QtGui from the pyqtgraph modulefrom pyqtgraph.Qt import QtCore, QtGui  # importing numpy as npimport numpy as np  import time  # creating a pyqtgraph plot windowwindow = pg.plot()  # icon for plot windowicon = QIcon("logo.png")  # setting icon to the plot windowwindow.setWindowIcon(icon)  # setting window geometry# left = 100, top = 100# width = 600, height = 500window.setGeometry(100, 100, 600, 500)  # title for the plot windowtitle = "GeeksforGeeks PyQtGraph"  # setting window title to plot windowwindow.setWindowTitle(title)  # create list for y-axisy1 = [5, 5, 7, 10, 3, 8, 9, 1, 6, 2]  # create horizontal list i.e x-axisx = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]  # create pyqt5graph bar graph item # with width = 0.6# with bar colors = greenbargraph = pg.BarGraphItem(x = x, height = y1, width = 0.6, brush ='g')  # add item to plot window# adding bargraph item to the windowwindow.addItem(bargraph)  # hiding the bargraphbargraph.hide()      # main methodif __name__ == '__main__':          # importing system    import sys          # Start Qt event loop unless running in interactive mode or using     if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):        QtGui.QApplication.instance().exec_()         
Output :
Python-gui
Python-PyQt
Python-PyQtGraph
Python
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