Hello



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.

(phylogenic relationship is tentatively neglected)



Thank you


Elaine

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