[R] Help on how to use cosinor analysis

[William Revelle]

Dear Friday,

You need to specify what package you are using.

There is a package (cosinor) that is meant for doing this.

In addition, the psych package has a cosinor function, as do the CircStats and circular packages.

For your data, you need to use the c() function 

library(psych)

Time=c(1,2,3,4,24)     #add more times 
Rectal=c(33.8,37.6,37.1,35.5,38.2)  #add more temperatures
cosinor(Time,Rectal)

Then, to plot these, you will need to form a data frame

timeTemp <- data.frame(Time,Rectal)
cosinor.plot("Time","Rectal",data=timeTemp)



> On Dec 23, 2015, at 7:45 AM, friday zakari <fridayzakari at gmail.com> wrote:
> 
> l am a beginner in the use of R for statistical analysis. I am finding it
> difficult to use cosinor to analyze the circadian rhythm in rectal
> temperature in broiler chicken.
> 
> Time=(1,2,3,4.........24)
> Rectal temp=(33.8,37.6,37.1,35.5,......38.2)
> 
> l will be very please if you can guide me on how to do the analysis using
> the sets of variables above as example and if you can also assist me with
> the R functions required for the analysis. thank you very much
> 
> 	[[alternative HTML version deleted]]
> 
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William Revelle		           http://personality-project.org/revelle.html
Professor			           http://personality-project.org
Department of Psychology   http://www.wcas.northwestern.edu/psych/
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