PyQtGraph – Getting Points Object at Specific Position in Scatter Plot Graph
In this article, we will see how we can get the point object at a specific location of the plot 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 scatter plot (aka scatter chart, scatter graph) uses dots to represent values for two different numeric variables. It is a type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data. The position of each dot on the horizontal and vertical axis indicates values for an individual data point. Points are basically graph items which is shown as spots on scatter plot graph. We can get points on the specific location as well.
We can create a plot window and create scatter plot graph on it with the help of commands given below.
# creating a pyqtgraph plot window plt = pg.plot() # creating a scatter plot graph of size = 10 scatter = pg.ScatterPlotItem(size=10)
In order to do this we use pointsAt method with the scatter plot graph object
Syntax : scatter.pointsAt(pos)
Argument : It takes QPoint object as argument
Return : It returns list
Below is the implementation.