[R] Arcsine transformation

[Peter Alspach]

Tena koe

I think you'll find the arcsine transformation is asin(sqrt(x/100)) where × is the percentage.  However, it might be better to ask whether the data wouldn't be better analysed using generalised models (e.g., glm).

HTH ....

Peter Alspach

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Ben Bolker
Sent: Monday, 23 September 2013 12:54 p.m.
To: r-help at stat.math.ethz.ch
Subject: Re: [R] Arcsine transformation

peake <peake.19 <at> osu.edu> writes:

> 
> 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!

asin(x/100)

? or

asin(x/100)*2/pi if you want the results rescaled to (0,1)

curve(asin(x/100)*2/pi,from=0,to=100)

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