exa3_9.m

有关matlab r2007的实用教程

f=sym('1/(1+x^2)');    % create the four expression
g=sym('sin(x)');
h=sym('1/(1+u^2)');
k=sym('sin(v)');

compose(f,g)     % find an expression for f(g(x))

compose(g,f)     % find an expression for g(f(x))

compose(h,k,'u','v')     %  given h(u)，k(v)，find(k(v))