[R] [FORGED] about fitting a regression line

Rolf Turner r.turner at auckland.ac.nz
Thu Jun 15 01:32:12 CEST 2017

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.


Rolf Turner

Technical Editor ANZJS
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276

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