[R] Rexcel path problem

[Berend Hasselman]

On 01-04-2011, at 16:12, Jorge Nieves wrote:

> 
> Hi,
> 
> I am running a test to call an R script with in excel using VBA. My VBA
> code is shown bellow. The middle section of this mail also includes the
> content of my Rscript.  The bottom part shows the error message form the
> R console.
> 
> It seems that Excel is  opening the R console without any problems. 
> 
> The problem I am seeing is that Rinterface.RRun  instruction is
> interpreting the "\T" part of the path as an R command. It does not
> recognize the "X:\Trading\Energy\JorgeSpace\TMPholder\cpixe\home
> models\" as a one single string, or path.
> 
> 
> Any ideas how can I fix the problem?
> 
> Thanks ,'
> 
> Jorge
> 
> 
> VB code
> Sub tester()
> 
>    Rinterface.StartRServer
> 
>     Rinterface.RRun
> ("source('X:\Trading\Energy\JorgeSpace\TMPholder\cpixe\home
> models\toto.R')")    
> 
>    Rinterface.StopRServer
> 
> End Sub
> 
> 
> 
> "R cript code toto.R"
> path = getwd()
> setwd(path)
> a = 5
> b=5
> x = matrix(rnorm(a*b),a,b)
> a = 5
> b=5
> 
> y = matrix(rnorm(a*b),a,b)
> z = x %*% y
> savefile = paste(path,"/","testresults.csv",sep="")
> write.csv(z, file = savefile)
> 
> Rconsole message
> 
> Type 'demo()' for some demos, 'help()' for on-line help, or
> 'help.start()' for an HTML browser interface to help.
> Type 'q()' to quit R.
> 
> Loading required package: rcom
> Loading required package: rscproxy
> Error: '\T' is an unrecognized escape in character string starting
> "source('X:\T"


R is just telling you that it doesn't recognize \T as a valid escape sequence in a character string.

See R for Windows FAQ 2.16 and 5.1.

Use \\ instead of a single \ as path separator or use the forward slash /.

Berend