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# Python Bokeh – Plotting Quadratic Curves on a Graph

• Last Updated : 10 Jul, 2020

Bokeh is a Python interactive data visualization. It renders its plots using HTML and JavaScript. It targets modern web browsers for presentation providing elegant, concise construction of novel graphics with high-performance interactivity.

Bokeh can be used to plot quadratic curves on a graph. Plotting quadratic curves on a graph can be done using the `quadratic()` method of the `plotting` module.

Parameters :

• x0 : x-coordinates of the starting points of the quadratic
• y0 : y-coordinates of the starting points of the quadratic
• x1 : x-coordinates of the ending points of the quadratic
• y1 : y-coordinates of the ending points of the quadratic
• cx : x-coordinates of the control points of the quadratic
• cy : y-coordinates of the control points of the quadratic

Returns : an object of class `GlyphRenderer`

Example 1 : In this example we will be using the default values for plotting the graph.

 `# importing the modules``from` `bokeh.plotting ``import` `figure, output_file, show``       ` `# file to save the model``output_file(``"gfg.html"``)``       ` `# instantiating the figure object``graph ``=` `figure(title ``=` `"Bokeh Quadratic Graph"``)``     ` `# the points to be plotted``x0 ``=` `1``y0 ``=` `4``x1 ``=` `5``y1 ``=` `4``cx ``=` `2.5``cy ``=` `8`` ` `# plotting the graph``graph.quadratic(x0, y0,``                ``x1, y1,``                ``cx, cy)``     ` `# displaying the model``show(graph)`

Output : Example 2 : In this example we will be plotting multiple quadratic curves with various other parameters.

 `# importing the modules ``from` `bokeh.plotting ``import` `figure, output_file, show `` ` `# file to save the model ``output_file(``"gfg.html"``) ``      ` `# instantiating the figure object ``graph ``=` `figure(title ``=` `"Bokeh Quadratic Graph"``) `` ` `# name of the x-axis ``graph.xaxis.axis_label ``=` `"x-axis"``      ` `# name of the y-axis ``graph.yaxis.axis_label ``=` `"y-axis"`` ` `# points to be plotted``x0 ``=` `[``1``, ``0``, ``0``]``y0 ``=` `[``4``, ``8``, ``5``]``x1 ``=` `[``5``, ``4``, ``4``]``y1 ``=` `[``4``, ``8``, ``7``]``cx ``=` `[``2.5``, ``2``, ``4``]``cy ``=` `[``8``, ``3``, ``4``]`` ` `# line color value of the quadratic``line_color ``=` `[``"yellow"``, ``"red"``, ``"purple"``]`` ` `# line width value of the quadratic``line_width ``=` `[``10``, ``5``, ``8``]`` ` `# plotting the graph ``graph.quadratic(x0, y0,``                ``x1, y1,``                ``cx, cy,``                ``line_color ``=` `line_color,``                ``line_width ``=` `line_width) ``      ` `# displaying the model ``show(graph)`

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