PyQtGraph – Getting Starting Co-ordinates of Line in Line Graph
In this article, we will see how we get the starting coordinates of the line i.e origin of the line of 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.) A line chart or line plot or line graph or curve chart is a type of chart that 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. The line graph is created with the help of a plot class in PyQtGraph. By setting start co-ordinate the line tends to start from new co-ordinates rather than from the origin. It can be set with the help of setPos method.
We can create a plot window and create lines on it with the help of commands given below
# creating a pyqtgraph plot window plt = pg.plot() # plotting line in green color # with dot symbol as x, not a mandatory field line = plt.plot(x, y, pen='g', symbol='x', symbolPen='g', symbolBrush=0.2, name='green')
In order to do this we use pos method with the line object
Syntax : line.pos()
Argument : It takes no argument
Return : It returns tuple
Below is the implementation.