[R] Arcsine transformation

[Michael Dewey]

At 02:26 23/09/2013, peake wrote:
>Thanks for the advice. Like I said, I am still pretty new to R, and stats
>in general. I tried wading through the search results on google, but I
>didn't really find anything that I could understand. I am working with
>percentages as my dependent variable, and I am trying to get my
>distribution as close to normal as possible. Is an arcsine transformation
>even the correct choice for my data? Querying R for help usually leaves me
>even more confused, so I was hoping someone could help me out by walking me
>through the process.

Transforming proportions is something which people involved in 
meta-analysis of non-comparative studies often do. You might like to 
look in the manual for metafor (on CRAN) and the function escalc 
which has a range of options under non-comparative studies. You might 
also look at betareg (on CRAN).

I think you also need to find some local statistical support as your 
question is now less about R and more about statistics.



>On Sun, Sep 22, 2013 at 8:00 PM, chuck.01 [via R] <
>ml-node+s789695n4676708h93 at n4.nabble.com> wrote:
>
> > ?asin
> >
> > also, try "Googling" anything you might want to do in R... it is there
> >
> > also, google... "R cheatsheet"  you will find several helpful sheets of
> > useful functions.
> >
> >
> >
> > peake wrote
> > I am tryin to perform an arcsine transformation on my data containig
> > percentages as the dep. variable. Does anyone have a code that I could use
> > to do that? I am relatively new to R. Thanks for your help!
> >
> >
> >
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Michael Dewey
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