Thursday, April 30, 2009

Primera prueba MatPlotLib

Usé el siguiente código de ejemplo para comprobar si había instalado bien MatPlotLib:
# plotting with the pylab module from matplotlib
# free from:
# used windows istaller matplotlib-0.90.0.win32-py2.5.exe
# tested with Python25 EU 4/21/2007
import math
import pylab # matplotlib
# create the x list data
# arange() is just like range() but allows float numbers
x_list = pylab.arange(0.0, 5.0, 0.01)
# calculate the y list data
y_list = []
for x in x_list:
y = math.cos(2*math.pi*x) * math.exp(-x)
pylab.ylabel("cos(2pi * x) * exp(-x)")
# draw the plot with a blue line 'b' (is default)
# using x,y data from the x_list and y_list
# (these lists can be brought in from other programs)
# other drawing styles -->
# 'r' red line, 'g' green line, 'y' yellow line
# 'ro' red dots as markers, 'r.' smaller red dots, 'r+' red pluses
# 'r--' red dashed line, 'g^' green triangles, 'bs' blue squares
# 'rp' red pentagons, 'r1', 'r2', 'r3', 'r4' well, check out the markers
pylab.plot(x_list, y_list, 'b')
# save the plot as a PNG image file (optional)
# show the pylab plot window
# you can zoom the graph, drag the graph, change the margins, save the graph

Esto es lo que aparece:

Y esta es la imagen que guarda:

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