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matplotlib.plot函数参数说明

函数定义

plot函数是用来画点的，当然也可以画线。

matplotlib.pyplot.plot(*args, **kwargs) Plot lines and/or markers to the Axes. args is a variable length argument, allowing for multiple x, y pairs with an optional format string. For example, each of the following is legal:  plot(x, y)        # plot x and y using default line style and color plot(x, y, 'bo')  # plot x and y using blue circle markers plot(y)           # plot y using x as index array 0..N-1 plot(y, 'r+')     # ditto, but with red plusses

参数说明

英文很简单，不详细注释，主要两类，style是线的样式，marker是点的样式。

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
‘	‘
‘_’	hline marker

颜色的设置：

character	color
‘b’	blue
‘g’	green
‘r’	red
‘c’	cyan
‘m’	magenta
‘y’	yellow
‘k’	black
‘w’	white

样例代码

#!/usr/bin/env python3  import matplotlib.pyplot as plt  def draw():     plt.plot([1,2,3], [1,2,3], 'go-', label='line 1', linewidth=2)     plt.plot([1,2,3], [1,4,9], 'rv',  label='line 2')     plt.axis([0, 4, 0, 10])     plt.legend()     plt.show()  draw()

代码说明，

两个plot就画了一条线和一组散列点，如果不指定线的类型，那么默认就是散列点。

axis 函数则指定了x,y坐标的范围，如果去掉，默认是点的坐标极值为范围。

legend 函数的调用则表示显示图例说明。

show 则是把图片显示出来

声明：

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原文 http://www.findspace.name/easycoding/1540

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