Displaying 2 results from an estimated 2 matches for "minussymbol".
2008 Aug 14
3
extending the derivs table/fools rushing in
....c is available at
http://www.zoology.ufl.edu/bolker/deriv_patch.txt .
I pretty much followed the framework of the other symbols;
here was my incantation
- } else if (CAR(expr) == PlogisSymbol) {
- ans = simplify(TimesSymbol,
- PP_S(TimesSymbol,
- PP_S2(ExpSymbol,
- PP_S2(MinusSymbol,CADR(expr))),
- PP_S(PowerSymbol,
- PP_S(PlusSymbol,
- Constant(1.),
- PP_S2(ExpSymbol,
- PP_S2(MinusSymbol,CADR(expr)))),
- Constant(-2.))),
- PP(D(CADR(expr),var)));
- UNPROTECT(8);
It seems to work:
> D(quote(plogis(a)),"a")...
1997 Apr 09
2
R-alpha: R <-> S compatibility; more demos -- using S-plus validate(..) ..
Look at the result of
(in S-plus:)
validate(verbose=TRUE, outfile="......./validate-3.4.out")
which gives (for me, S-plus 3.4 on Solaris 2.5)
2106 Lines of output.
It's full of tests using "standard data sets". (--> 'demos' available!)
Basically, at the end of each example, there are statements which
should return TRUE if the 'validation test' is