一 介紹
官網：
二 **
import
numpy
asnp
import
matplotlib
.pyplot
asplt
#line
x=np
.linspace
(-np.pi
,np.pi
,256
,endpoint
=true
)#定義余弦函式正弦函式
c,s
=np.cos(x
),np
.sin(x
)plt
.figure(1
)#畫圖，以x為橫座標，以c為縱座標
plt
.plot(x
,c,color
="blue"
,linestyle
="-"
,label
="cos"
,alpha
=0.5
)plt
.plot(x
,s,"r*"
,label
="sin"
)#增加標題
plt
.title
("cos & sin"
)ax
=plt
.gca
()ax
.spines
["right"
].set_color
("none"
)ax
.spines
["top"
].set_color
("none"
)ax
.spines
["left"
].set_position
(("data",0
))ax
.spines
["bottom"
].set_position
(("data",0
))ax
.xaxis
.set_ticks_position
("bottom"
)ax
.yaxis
.set_ticks_position
("left"
)plt
.xticks
([-np.pi
,-np.pi
/2,0
,np.pi
/2,np
.pi],
[
r'$-\pi$',r
'$-\pi/2$',r
'$0$',r
'$+\pi/2$',r
'$+\pi$'
])plt
.yticks(np
.linspace(-1
,1,5
,endpoint
=true
))for
label
inax
.get_xticklabels
()+ax
.get_yticklabels
():label
.set_fontsize(16
)label
.set_bbox
(dict
(facecolor
="white"
,edgecolor
="none"
,alpha
=0.2
))#圖例顯示
plt
.legend
(loc
="upper left"
)#顯示網格
plt
.grid
()#顯示範圍
#plt.axis([-1,1,-0.5,1])
plt
.fill_between(x
,np.abs(x
)<
0.5,c,
c>
0.5,
color
="green"
,alpha
=0.25
)t
=1plt
.plot([t
,t],[0,np
.cos(t
)],"y"
,linewidth=3
,linestyle
="--"
)plt
.annotate
("cos(1)",xy
=(t,np
.cos(1
)),xycoords
="data"
,xytext
=(+10
,+30
),textcoords
="offset points"
,arrowprops
=dict
(arrowstyle
="->"
,connectionstyle
="arc3,rad=.2"
))#顯示圖形
plt
.show
()
三 執行結果
大小: 64.8 kb
Lua繪製正弦曲線
夜半突來興致，看了下wxlua的圖形處理部分，感覺挺好玩，就試著寫了一段畫正弦曲線的 為了實現動畫效果特意新增了延遲效果，感覺延遲的效率好低，畫的時候視窗拖都拖不動。效果圖 部分 點和線實現正弦曲線 wxlua支援 aurhor chuwp date 2010.10.30 require wx lo...
matplotlib繪製等直線
利用contour contourf 描繪等值線 contourf 帶有填充效果 def fig2 y,x np.ogrid 2 2 200j,3 3 300j z x np.exp x 2 y 2 extent np.min x np.max x np.min y np.max y plt.fig...
Python使用matplotlib繪製三維曲線
本文主要演示如何使用matplotlib繪製三維圖形 如下 coding utf 8 import matplotlib as mpl from mpl toolkits.mplot3d import axes3d import numpy as np import matplotlib.pyplo...