[R] Transformation of the circular variable into linear variable

[David Winsemius]

On May 5, 2015, at 3:59 AM, Nasr Al-Dhurafi wrote:

> Dear All
> 
> I am working with a circular data ( wind direction ) and i have problem
> in transforming  the circular variable into linear variable. I have found
> an equation that can be used to convert the circular variable into linear
> variable which is included in this paper *" ARMA based approaches for
> forecasting the tuple of wind speed and direction". *The equation is called
> as the inverse of a link function and i have attached  the summery of it.T
> herefore,Please, if you have an idea of how to conduct it in R programming
> or  if you have another method for transformation, let me know it. Your
> cooperation is highly appreciated.
> 
> My Best Regards &  All The Best

Here are a couple of plausible explanations for a lack of response to your first message posted 2 months ago:

Neither of your duplicate messages have any attachments. This could be caused by the fact (buried away in one or more of webpages or Posting Guides that define the Rhelp facility)  the information that the mail-server used by the Rhelp list strips any attachments unless they are one of the limited number accepted file formats. (It does not notify posters of htis fact when they submit unacceptable formats.)  The 4 formats I know to be accepted are: MIME-text, .pdf, .ps or .png. Even if you submit formats that you might think would be considered "text", they will not be accepted if they have non-".txt" extensions such as ".csv". As far as I can tell ... only .txt extensions are passed through.

I find an article by that name in Applied Energy Volume 88, Issue 4, April 2011, Pages 1405–1414. The publisher offers a copy at the price of 42 USD. (Expecting us to buy that article seems unreasonable.)

Most of us are not meteorological researchers. In general list members are more likely to respond to requests that include a) sample data, b) code that reflects your efforts, and c) a specification of correct output. It may be helpful to list details of your position.

-- 
David.

> 
> Nasr
> 
> On Mon, Mar 30, 2015 at 8:22 PM, Nasr Al-Dhurafi <ldhrf at siswa.ukm.edu.my>
> wrote:
> 
>> I am working with a circular data ( wind direction ) and i have problem
>> in transforming  the circular variable into linear variable. I have found
>> an equation that can be used to convert the circular variable into linear
>> variable which is included in this paper *" ARMA based approaches for
>> forecasting the tuple of wind speed and direction". *The equation is
>> called as the inverse of a link function and i have attached  the summery
>> of it.Therefore,Please, if you have an idea of how to conduct it in R
>> programming or  if you have another method for transformation, let me
>> know it. Your cooperation is highly appreciated.
>> 
>> My Best Regards &  All The Best
>> Nasr
>> 
> 
> 	[[alternative HTML version deleted]]
> 
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David Winsemius
Alameda, CA, USA