[R] Influence of subdataset

[Marcel Sandow]

Dear r-helpers!

Two closely related questions:

1) I would like to analyse the influence of a subdataset on the whole dataset (50 out of 350 datapoints) linear regression slope. I have read about influence.measures but this analyses only single datapoint. 

2) I would like to compare the slope of the whole dataset with the slope of a subdataset consisting of the maximum values of 10 equal x-axis classes.

any suggestions?

Thanks

Marcel 

______________________________________________________________________________

Marcel Sandow

Leibniz Institute of Marine Sciences - IFM-Geomar
Experimental Ecology: Foodwebs
Düsternbrooker Weg 20
24105 Kiel
Germany

Fon: +49-431-600-4404
Fax: +49-431-600-1515

Homepage: http://www.ifm-geomar.de
E-mail: msandow at ifm-geomar.de