Hi, Anybody knows if I can use "deriv" to implement CHAIN RULE AND MATRIX derivation. Simple examples:
y=expression(log(x)) z=expression (x*y) deriv(z,"x") # chain rule f=expression(det(x)) # where x is an (nxn) matrix deriv(f, "x") Is there any way to work around this? Thank you very much. Ahmad Abu Hammour PS. by the way I tried to send the same email using my http-based account [EMAIL PROTECTED], but I could not, although I set send email to plain text. ______________________________________________ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help
