[R] Non linear Square fit Function

Liaw, Andy
Wed, 05 Jan 2005 00:55:34 -0000

Have you tried fitdistr in the MASS package (should be installed with R by
default)?

Andy

> From: Jagarlamudi, Choudary
>
> Hi all,
> I'm trying to use the nls function to do a nls curve fit. I
> have a histogram for my data. I need to get athe best curve
> fit for this. i am plotting experimental vs the theoretical
> values. my experimental values are got from my dnorm
> function, mean=mean of my mid values(hist) and sd=sd of my
> mid values. For the theoretical i'm using mean and sd of all
> 20000 raw values as the start values. I'm getting no sd in my
> new curve. Can someone gimme some pointers to get started here.
> I need my nls to spit out sd and mean of the new fit which it
> does'nt. is there a better function or can i somehow get around this.
> Thanks in advance.
>
> Choudary Jagarlamudi
> Instructor
> Southwestern Oklahoma State University
> STF 254
> 100 campus Drive
> Weatherford OK 73096
> Tel 580-774-7136
>
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