[R] [FORGED] about fitting a regression line

[Rolf Turner]

On 15/06/17 10:40, lily li wrote:
> Hi R users,
> 
> I have some data points (Xi, Yi), and they may follow such a pattern Yi =
> cCOS(Xi) + d, how to find the c and d in R? which function to use? Also,
> how to get the R2 and p value for this correlation? Thanks for any kind of
> help.

If I understand you correctly (always a dubious conditional):

     fit <- lm(y ~ cos(x))

where y and x are vectors of the y and x values of your data points, 
should answer all of your questions.

I am bewildered that you need to ask.  You have been posting to this 
list for quite a while.  Have you learned nothing about R?  It's time 
that you did.  Read and study carefully "An Introduction to R" from the 
R web site -> Manuals.

cheers,

Rolf Turner

-- 
Technical Editor ANZJS
Department of Statistics
University of Auckland
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