3楼: Originally posted by dbb627 at 2011-12-13 09:46:19:
f1=sym('x+y')
f=char(f1)
sym(f(1))
sym(f(5))
sym(f(3))%+号好像不能用sym

f =

x + y


f =

x + y


ans =

x


ans =

y

??? Error using ==> sym.sym>convertE ...

2楼: Originally posted by wqding at 2011-12-13 08:25:57:
提取一个整数的各个位上的值？
a=sym('12');
b=floor(vpa(a/10));
c=a-b*10;
不过这样和sys就没啥关系了，呵呵。