6-6.m

MATLAB科学计算与工程分析源代码源程序5

clear
syms x y
f=log(exp(2*(x+y^2))+(x^2+y)+sin(1+x^2));
fx=diff(f,x)
fy=diff(f,y)
fxy=diff(fx,y)
fyx=diff(fy,x)
fxx=diff(fx,x)
fyy=diff(fy,y)
fxx=diff(f,x,2) 
fyy=diff(f,y,2)