# -*- coding: utf-8 -*- Created on Sat Jul1818:13:292026author: Thomasimportnumpy as npimportmatplotlib.pyplot as plt# 屏幕显示和默认保存分辨率plt.rcParams.update({figure.dpi:180,savefig.dpi:600,font.size:14,axes.titlesize:17,axes.labelsize:15,legend.fontsize:12,xtick.labelsize:12,ytick.labelsize:12,lines.linewidth:2.5,})x_m3.0#alphas [0.5, 1.0, 1.5, 2.0, 3.0, 5.0, 10.0]alphas[0.5,4.0]xnp.linspace(x_m,10,3000)foralphainalphas: pdfalpha * x_m**alpha / x**(alpha 1)plt.plot(x, pdf,linewidth2,labelrf$\alpha{alpha}$)plt.xlabel(r$x$)plt.ylabel(r$f(x)$)plt.title(rfPareto PDF,$x_m{x_m}$)plt.xlim(x_m,10)plt.ylim(bottom0)plt.grid(alpha0.3)plt.legend()plt.tight_layout()plt.savefig(pareto_pdf.png,dpi300)plt.show()