1、 > plot(1:5, 1:5, xlim = c(0,6), ylim = c (0,6), type = "n") > arrows(x0 = 1, y0 = 1, x1 = 4, y1 = 4) 2、 同时画两个箭头 > plot(1:5, 1:5, xlim = c(0,6), ylim = c (0,6), type = "n") > arrows(x0 = c(1, 1), y0 = c(1, 2),
PART.0 Mandelbrot 介绍 “无规则的碎片” “魔鬼的聚合物” “上帝的指纹” Mandelbrot集合有着多种称谓，那么什么是曼德勃罗特集？Mandelbrot集合可以用复二次多项式： f c
import numpy as np import matplotlib.pyplot as plt w=np.linspace(0,1000,1000) b=np.abs(1/(1+0.1j*w)) plt.subplot(221) plt.plot(w,b,linewidth=2,linestyle="-") plt.ylim(0,1) plt.subplot(222) plt.semilogx(w,b,linewidth=2,linestyle="--"
