Hi- I'm a biologist trying to figure out the growth rate of salamanders in different ponds. I collected individuals from various populations at different dates, and using the size and date collected, I want to figure out the growth curve of each population. My question is: How do I fit my data to a Gompertz function in R? Thank you so much! Sarah -- View this message in context: http://www.nabble.com/Fitting-data-to-a-sigmoidal-curve-tp20466784p20466784.html Sent from the R help mailing list archive at Nabble.com.
On 13/11/2008, at 7:50 AM, sarahkm wrote:> > Hi- > I'm a biologist trying to figure out the growth rate of salamanders in > different ponds. I collected individuals from various populations at > different dates, and using the size and date collected, I want to > figure out > the growth curve of each population. My question is: How do I fit > my data to > a Gompertz function in R??nls ###################################################################### Attention:\ This e-mail message is privileged and confid...{{dropped:9}}
Try this command from within R:
RSiteSearch("gompertz")
On Wed, Nov 12, 2008 at 1:50 PM, sarahkm <sarahkm at stanford.edu>
wrote:>
> Hi-
> I'm a biologist trying to figure out the growth rate of salamanders in
> different ponds. I collected individuals from various populations at
> different dates, and using the size and date collected, I want to figure
out
> the growth curve of each population. My question is: How do I fit my data
to
> a Gompertz function in R?
> Thank you so much!
> Sarah
> --
> View this message in context:
http://www.nabble.com/Fitting-data-to-a-sigmoidal-curve-tp20466784p20466784.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at 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.
>
Sarah, Doing:> RSiteSearch('gompertz', restrict='functions')At the command prompt gives several promising results. Hope this helps, -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.snow at imail.org 801.408.8111> -----Original Message----- > From: r-help-bounces at r-project.org [mailto:r-help-bounces at r- > project.org] On Behalf Of sarahkm > Sent: Wednesday, November 12, 2008 11:50 AM > To: r-help at r-project.org > Subject: [R] Fitting data to a sigmoidal curve > > > Hi- > I'm a biologist trying to figure out the growth rate of salamanders in > different ponds. I collected individuals from various populations at > different dates, and using the size and date collected, I want to > figure out > the growth curve of each population. My question is: How do I fit my > data to > a Gompertz function in R? > Thank you so much! > Sarah > -- > View this message in context: http://www.nabble.com/Fitting-data-to-a- > sigmoidal-curve-tp20466784p20466784.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at 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.