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| View Original: | Polynomialdeg3.svg (400x400) | |||
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| Keywords: Polynomialdeg3.svg Polynomial of degree 3 <math> \begin align y \tfrac 1 4 x+4 x+1 x-2 \\ \tfrac 1 4 x 3+3x 2-6x-8 \\ \tfrac 1 4 x 3+\tfrac 3 4 x 2-\tfrac 3 2 x-2 \end align </math> The roots are 2 -1 and -4 Polynomialdeg3 png 2007-01-06 N Mori v python Author Ika 2013-07-24 from pylab import import pylab as pl import numpy as np Create a figure of size 8x6 points 80 dots per inch pl figure figsize 8 8 dpi 80 Create a plot of the cubic function y x+4 x+1 x-2 /4 x np linspace -5 0 4 0 256 endpoint True y x+4 x+1 x-2 /4 pl plot x y color magenta linewidth 3 0 linestyle - Set labels pl xlim -5 4 pl ylim -4 7 Move the spines ax pl gca ax set_xlabel 'x' ax set_ylabel 'y' ax text -5 3 r' y \frac 1 4 x+4 x+1 x-2 ' fontsize 20 Set up the grid ax spines'right' set_color 'none' ax spines'top' set_color 'none' ax xaxis set_ticks_position 'bottom' ax spines'bottom' set_position 'data' 0 ax yaxis set_ticks_position 'left' ax spines'left' set_position 'data' 0 ax grid color grey linestyle '--' linewidth 1 Save the figure to the output SVG file plt savefig Cubic_Function_SVG svg ; Cubic polynomials | ||||
