#!/usr/bin/python
# -*- coding: UTF-8 -*-
import matplotlib.pyplot as plt
x=[i for i in range(-20,20)]
y=[i**2 for i in x]
# plt.plot(x,y)
# plt.plot(x,y,color="red",linestyle="-.",marker="o") #linestyle="dashed"虚线 marker="o"表示标记为圆圈
# plt.plot(x,y,"ro-") "ro-"表示红色线,标记为圆圈 简写
# plt.show()
z=[i*2 for i in x]
plt.plot(x,y,"ro-",x,z,"g-",[2*i for i in x ],z,"bo-")
plt.show()
# character color
# ‘b’ blue
# ‘g’ green
# ‘r’ red
# ‘c’ cyan
# ‘m’ magenta
# ‘y’ yellow
# ‘k’ black
# ‘w’ white
# character description
# '-' solid line style
# '--' dashed line style
# '-.' dash-dot line style
# ':' dotted line style
# '.' point marker
# ',' pixel marker
# 'o' circle marker
# 'v' triangle_down marker
# '^' triangle_up marker
# '<' triangle_left marker
# '>' triangle_right marker
# '1' tri_down marker
# '2' tri_up marker
# '3' tri_left marker
# '4' tri_right marker
# 's' square marker
# 'p' pentagon marker
# '*' star marker
# 'h' hexagon1 marker
# 'H' hexagon2 marker
# '+' plus marker
# 'x' x marker
# 'D' diamond marker
# 'd' thin_diamond marker
# '|' vline marker
# '_' hline marker
