Classification: UNCLASSIFIED Caveats: NONE I really appreciate Mr. Dallazuanna's quick reply for my question. See below.
Kyong -----Original Message----- From: Henrique Dallazuanna [mailto:www...@gmail.com] Sent: Thursday, January 21, 2010 3:13 PM To: Park, Kyong H Mr CIV USA AMC Cc: r-help@r-project.org Subject: Re: [R] Retrieving an evaluated gradient value (UNCLASSIFIED) Try this: attr(junk1(k=0,b0=-14.0236,b1=2.44031), 'gradient') On Thu, Jan 21, 2010 at 6:05 PM, Park, Kyong H Mr CIV USA AMC <kyong.ho.p...@us.army.mil> wrote: > Classification: UNCLASSIFIED > Caveats: NONE > > Dear R users, > > How can I retrieve an evaluated gradient value from "deriv" function > provided below? I want to retrieve b0 value. Appreciate your help. > > Kyong > > junk1<-deriv(~(1/b1)*k-b0/b1,"b0",c("k","b0","b1"),formal=T) > > junk1(k=0,b0=-14.0236,b1=2.44031) > [1] 5.746647 > attr(, "gradient"): > b0 > [1,] -0.409784 > > Classification: UNCLASSIFIED > Caveats: NONE > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O Classification: UNCLASSIFIED Caveats: NONE ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.