PyQtGraph – Getting Visibility Property of Error Bar Graph
In this article, we will see how we can get the visibility property of the error 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.). Error bars are graphical representations of the variability of data and used on graphs to indicate the error or uncertainty in a reported measurement. They give a general idea of how precise a measurement is, or conversely, how far from the reported value the true value might be. By default error bar graph is visible although we can change this property to make it invisible. It can be set with the help of the setVisible method.
We can create a plot window and create an error bar graph on it with the help of commands given below.
# creating a pyqtgraph plot window plt = pg.plot() # creating a error bar item object error = pg.ErrorBarItem(x=x, y=y, top=top, bottom=bottom, beam=0.5)
In order to do this we use isVisible method with the error bar item object
Syntax : error.isVisible()
Argument : It takes no argument
Return : It returns bool
Below is the implementation.