Symbolic derivation

Wenyaun Xi (
Sun, 11 Jan 1998 20:38:27 -0700 (MST)


This is Wenyuan Xi of U of Utah, graduate student at Econ. dept.

I ran into some problems when I tried to get symbolic derivation by
using a function deriv3(). The expression contains 18
parameters, of which I want to have an information matrix eventually. I
ran it on my 200MHz Pentium PC with 64meg RAM. Each time I kick out the
job, the S-plus 3.1 for Windows stops after about 2 hour of real time
and suggests that it requires more memory(size varies each time) in
addition to those already in use. I don't know if this is a memory related
problem or there is a whole different issue involved here other than the

Like to hear from you.


Wenyuan Xi