Graph

The Graph widget is a widget for displaying plots. It supports drawing multiple plot with different colors on the Graph. It also supports a title, ticks, labeled ticks, grids and a log or linear representation on both the x and y axis, independently.

To display a plot. First create a graph which will function as a "canvas" for the plots. Then create plot objects e.g. MeshLinePlot and add them to the graph.

To create a graph with x-axis between 0-100, y-axis between -1 to 1, x and y labels of and X and Y, respectively, x major and minor ticks every 25, 5 units, respectively, y major ticks every 1 units, full x and y grids and with a red line plot containing a sin wave on this range::

from math import sin
from kivy.garden.graph import Graph, MeshLinePlot
graph = Graph(xlabel='X', ylabel='Y', x_ticks_minor=5,
x_ticks_major=25, y_ticks_major=1,
y_grid_label=True, x_grid_label=True, padding=5,
x_grid=True, y_grid=True, xmin=-0, xmax=100, ymin=-1, ymax=1)
plot = MeshLinePlot(color=[1, 0, 0, 1])
plot.points = [(x, sin(x / 10.)) for x in range(0, 101)]
graph.add_plot(plot)

The MeshLinePlot plot is a particular plot which draws a set of points using a mesh object. The points are given as a list of tuples, with each tuple being a (x, y) coordinate in the graph's units.

You can create different types of plots other than MeshLinePlot by inheriting from the Plot class and implementing the required functions. The Graph object provides a "canvas" to which a Plot's instructions are added. The plot object is responsible for updating these instructions to show within the bounding box of the graph the proper plot. The Graph notifies the Plot when it needs to be redrawn due to changes. See the MeshLinePlot class for how it is done.