[R] To predict Y based on only one sample of X and Y

[David Winsemius]

On Aug 27, 2012, at 8:49 PM, Elaine Kuo wrote:

> I want to predict wing length using regression commands. (lm and  
> predict)
>
> The data details are as followed
> Data:
>
> Bird physiological data
>
> 1. body mass
> 2. body length
> 3. wing length
>
> Data type:
>
> Order A: consisting of 20 species, body mass and length of all 20  
> species are measured
>
> Order B: consisting of 2 species, body mass and length of only 1  
> species is
> measured
>
> Order C: consisting of 5 species, body mass and length of only 1  
> species is
> measured
>
> Method:
>
> 1.      for order A, using predict and lm
>
> datam.lm <-lm(Wing.Length~Body.mass+Body.Length)
>
> However, for order B and C, please kindly advise any method to get  
> wing
> length based on body mass and length.

Perhaps the Delphi method?

>
> (phylogenic relationship is tentatively neglected)
>
>
> Elaine
>
> 	[[alternative HTML version deleted]]
-- 
David Winsemius, MD
Alameda, CA, USA