[R] Programming Statistical Functions

[stephen sefick]

Maybe and r site search would help?  Try and figure out how to
calculate these yourself.  If you need help send a minimal,
reproducible example to this list, and you will probably recieve help.
 If you need a starting place for programming functions look at an
introduction to R.

#coefficient of variation
CV <- function(x){mean(x)/sd(x)}

 My $0.02.

Stephen

On Fri, Jul 30, 2010 at 7:53 AM, hector <hector at ceam.es> wrote:
>
> Hello,
> I'm new in R. I'm meteorological modeller and i will calculate some
> statistics for my model results.
> These statistis are the follow:
>
> ANB: Average Normalized Absolute BIAS
> MNB: Mean Normalized BIAS
> MNE: Mean Normalised Error
> STDE: Standard Deviation of Error
> FB: Fractional BIAS
> MG: Geometric Mean BIAS
> VG: Geometric Variance
> SKVAR: Skill Variance
> RMSE: Root Mean Square Error
> NMSE: Normalized Mean Square Error
> r: Correlation Coefficient
> CV: Coeficient of Variation
> FAC2: Fractional Predictions within a factor of two of observations
> Hc: Hit Rate
> IOA: Index of Agreement
> Au: Unpaired Peak Concentration Accuracy
> As: Spatially-paired Peak Concentration Accuracy
>
> And their expressions are in the upload file:
> http://r.789695.n4.nabble.com/file/n2307880/Statistics.doc Statistics.doc
>
> I think that someone was developed this statistical functions for use in R,
> but if don't exist, someone help me to programme it? Thank you!
>
>
>
> --
> View this message in context: http://r.789695.n4.nabble.com/Programming-Statistical-Functions-tp2307880p2307880.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Stephen Sefick
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