[R] Robust ANCOVA

[David Winsemius]

> On Mar 27, 2016, at 9:52 AM, HAMID REZA ASHRAFI via R-help <r-help at r-project.org> wrote:
> 
> HiI have a set of data with two independent variables, a pretest (covariate) and posttest (dependent variable).Can anyone help me run robust ANCOVA?If you wish I can send you the data file.yours
> 	[[alternative HTML version deleted]]

https://cran.r-project.org/web/views/Robust.html

help(pac=MASS, rlm)

# A starting point perhaps:

MASS::rlm( Post ~ pre +IV1 + IV2, data=yourdataframe)


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David Winsemius
Alameda, CA, USA