python画9个同心圆

阴帘非3634如何快速绘制多个同心圆 -
甘裕鬼17836944785 ______ 用ps画: 先画大的,用椭圆选择工具拖出圆选区,填充你要的颜色(如果你只画边线则用编辑下的“描边”),不要取消选择,执行选择菜单下的“变换选区”命令,按住Shift+Alt键,鼠标拖动其中一个角的手柄,往圆心推,得到一个比刚才小...

阴帘非3634怎么用matlab画一组同心圆 -
甘裕鬼17836944785 ______ row=0:pi/20:2*pi; R=2;%半径 x=R*cos(row); y=R*sin(row); plot(x,y) hold on R=3; x=R*cos(row); y=R*sin(row); plot(x,y) axis equal 这样子就花了两个以(0,0)为原点的,半径分别为2,3的圆了.

阴帘非3634编写Applet程序,在屏幕上画一组同心圆,相邻两圆的直径大小相差10(pixel)(画满整个屏幕). -
甘裕鬼17836944785 ______ import java.awt.Graphics; import javax.swing.*; public class MyApplet extends JApplet{ public void init(){//g.drawArc(x, y, width, height, startAngle, arcAngle) add(new MP()); } class MP extends JPanel{ public void paint(Graphics g){ super.paint(g); for...

阴帘非3634如何采用Python语言绘制一个五角星 -
甘裕鬼17836944785 ______ #!/usr/bin/env python import turtle import time turtle.forward(100) turtle.right(144) time.sleep(1) turtle.forward(100) turtle.right(144) time.sleep(1) turtle.forward(100) turtle.right(144) turtle.forward(100) time.sleep(1) turtle.right(144) turtle.forward(100) time.sleep(3)

阴帘非3634如何用mathematica画同心圆?语法越简单越好 -
甘裕鬼17836944785 ______ 代码: n = 0.3; ParametricPlot[{{v Cos[u], v Sin[u]}, {n Cos[u] + 1, n Sin[u] + 1}, {(3 n)/4 Cos[u] + 1, (3 n)/4 Sin[u] + 1}, {(2 n)/4 Cos[u] + 1, (2 n)/4 Sin[u] + 1}, {(1 n)/4 Cos[u] + 1, (1 n)/4 Sin[u] + 1}}, {u, 0, 2 Pi}, {v, 1, 3}, AspectRatio -> 1, PlotRange -> ...

阴帘非3634我先画了个圆,然后想再画个同心圆,但不好捕捉到圆心,用功004的就能很容易地捕捉到,请问怎么设置啊 -
甘裕鬼17836944785 ______ 按shift再画