In this article we will see how we can create line 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 line chart or line plot or line graph or curve chart is a type of chart which displays information as a series of data points called ‘markers’ connected by straight line segments. It is a basic type of chart common in many fields. Line graph is created with the help of plot class in PyQtGraph.
In order to plot the bar graph in PyQtGraph we have to do the following
1. Importing the PyQtgraph module
2. Creating a plot window
3. Create or get the plotting data i.e horizontal and two vertical data for two lines
4. Set range to the plot window
5. Plot the line on the plot window and specifying properties of the line
Below is the implementation
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