chapters of Pictures

Today begins the chapters of daily picture

i finished a simple flag with turtle library in Python

the Path in my computer of the code: /code/python/入门经典/page166.py

使用numpy和pylab画图

import numpy

import pylab

x=numpy.arange(0,4*numpy.pi,0.1)

y1=numpy.sin(x)

y2=numpy.cos(x)

pylab.title(‘Sin and Cos’)

pylab.plot(x,y1,‘b’)

pylab.plot(x,y2,‘r’)

pylab.show()