摘要：
syms x y f = y*sin(x)-x*cos(y); fsurf(f,[-2*pi 2*pi]) a = gca; a.TickLabelInterpreter = "latex"; S = sym(a.XLim(1):pi/2:a.XLim(2)); S = sym(round(S/pi 阅读全文
摘要：
function [Acov]= cov_func(AA, desc) %cov_func(): 协方差计算 %INPUT: % AA: data matrix % desc: 'sample':样本协方差/'total':总体协方差 %OUTPUT: % Acov: 协方差矩阵 [Adim, An 阅读全文