[R] code for model-averaging by Akaike weights

[Bókony Veronika]

Dear all,

does anyone have r code to perform model-averaging of regression 
parameters by Akaike weights, 
and/or to do all-possible-subsets lm modelling that reports parameter 
estimates, AICc and number of parameters for each model? 

I have been looking for these in the archive but found none.

(I am aware that many of you would warn me against these methods 
advocated by Burnham and Anderson 2002, please do not.)

Thank you,
VB




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