Nabble - Rcom-l

Re: Need help for RExcel

2009-10-04T00:26:26Z

hmmm..... I am wondering there is an error when I try to connect to Rcmdr in Excel....

error.jpg

Re: Need help for RExcel

2009-10-02T23:55:32Z

It should be done if you just follow the installation instructions, may be you forgot to activate the RExcel RegisteryKey in Start>>Program>>R>>RExcel

Hope this helps....

execute R by VBA

2009-09-23T23:59:22Z

Hello everyone

I am using RExcel, an add-in for R to use R within MS Excel workbook. The add-in is freely distributed by Statconn. Pls refer http://www.statconn.com/
I need help to start writing VBA Macro to invoke and execute R to read .csv file.
This is the code what I made so far… but the compilation error was occured.

Public ActiveServerAtStart As Boolean

Sub Get_Value()

MsgBox "R putting data into excel"
Rinterface.StartRServer
Rinterface.RRun "z<-read.csv("F:\\mycsvfile.csv",header=TRUE)"
Rinterface.GetArray "z", Range("Sheet1!A1")
Rinterface.StopRServer

End Sub

Here “mycsvfile.csv” is target file from which the data is needed to be retrieved. Get_Value() is macro name for the active worksheet. I want to get the data to the sheet1 (cell A1) of active work sheet.

Thanks in advance.

Need help for RExcel

2009-08-12T08:06:37Z

I followed the intruction and installed

RAndFriendsSetup2091V3.0-16-2

everything is successful. However, after all of the installation finished, I don't see RExcel on my machine. I see R on my machine. I can open Excel, but there's no sign of RExcel. What have I missed?

Thank you very much.

Embed R plots in C#

2009-08-05T11:46:02Z

I am trying to embed R plots in a visual C# windows form, so that I can have some buttons, and by clicking them, I can plot the chart on that window itself. Do you guys think this is possible to do?

Problem in calling/getting responce from NLS using VB.NET

2009-08-05T05:01:34Z

Hi All

Please see the code below.

I am trying to call NLS method in R using VB.NET with the below shown arguments.
I have created a Data using CBIND and then Writing and Reading the CSV File.

When I execute the NLS Call, it gives me the Error "Object is static; operation not allowed (Exception from HRESULT: 0x8004000B (OLE_E_STATIC))" (-2147221493).

V1, V2 , ...V5 are column names in the CSV file generated.

Any help will be really appreciated.

RCon.SetSymbol("Df", Df)
RCon.Evaluate("Df<-cbind(Ri,E0,Emax,ED50,Lamda,Dosage,Epsilon)")
outputDf = RCon.GetSymbol("Df")
listDf.Add(outputDf)

RCon.SetSymbol("DD", DD)
RCon.EvaluateNoReturn("write.table(Df,file=""C:/Javed/data.csv"",append=FALSE,quote=TRUE,sep="","",eol=""\n"",na=""NA"",dec=""."",row.names=TRUE,col.names=NA)")

RCon.Evaluate("DD<-read.table(""C:/Javed/data.csv"",header=T,sep="","")")

RCon.Evaluate("RRR<-nls(V1~V2+((V6^V5)*V3)/((V4^V5)+(V6^V5)),data=DD,start=c(V3=-44,V2=-6,V4=1.5,V5=1.2))")

Thanks

Javed Chaudhari

Problem in calling data.frame from VB.NET

2009-08-05T02:48:11Z

Hi All

Please find the below code.

I have outputE0 and outputEmax as 2-D Arrays returned from R (equivalent to matrices in R terms) with 50 rows and 1 column.

Now when I am trying to create data frame using (data.frame syntax in R), I am getting only 1 single row with 2 columns instead of 50 rows.Ideally data.frame should combine both the matrices and give 1 single datastructure (matrix) with 50 rows and 2 columns.

Please share what is the problem or resolution.

Dim E0 As Object(,)
Dim Emax As Object(,)

Dim outputE0 As Object
Dim outputEmax As Object

Dim listE0 As New List(Of Double(,))
Dim listEmax As New List(Of Double(,))

RCon.SetSymbol("E0", E0)
RCon.Evaluate("E0<-matrix(rnorm(50,-1,10),ncol=1)")
outputE0 = RCon.GetSymbol("E0")
listE0.Add(CType(outputE0, Double(,)))

RCon.SetSymbol("Emax", Emax)
RCon.Evaluate("Emax<-matrix(rnorm(50,-1,10),ncol=1)")
outputEmax = RCon.GetSymbol("Emax")
listEmax.Add(CType(outputEmax, Double(,)))

RCon.SetSymbol("Df", Df)
RCon.Evaluate("Df<-data.frame(E0,Emax)")
outputDf = RCon.GetSymbol("Df")
listDf.Add(outputDf)

Thanks

Javed

R-function is calculated four-times when starting with RExcel

2009-07-08T03:29:10Z

Hi everyone,

I have the following problem:

I'm starting an R-function via VBA from Excel using the following code:
...

RInterface.StartRServer
RInterface.RRun "source(" & r_source & ")"
RInterface.GetArray "function1(" & x1 & "," & x2 & "," x3 & "," x4 & ")", Range(myRange)
RInterface.StopRServer

...

where "r_source" contains the path to the R-script where "function1" is defined and the values for "x1", "x2", etc. are defined earlier in the VBA code. "function1" prints a matrix which is then writen into a sheet in my Excel file (in myRange).

When I define "x1", "x2", etc. directely in R and then evaluate "function1(x1, x2, x3, x4)" in R, the results are (as wished) only calculated once. But if I start it from Excel using the VBA code above, the results are calculated 4-times before the matrix is written into Excel. Which of course is not very time efficient...

Does anyone have an idea how to solve this problem? That would be great!

Thanks a lot in advance! Greets,
Corinne

Re: How to convert R variable to Excel variable & vice versa

2009-06-15T21:52:08Z

Please find the attached document, perhaps it might help..............
RExcel.doc

Re: How to convert R variable to Excel variable & vice versa

2009-06-15T03:06:54Z

I would like to convert some codes from R to Excel as well, anyone can help????

How to convert R variable to Excel variable & vice versa

2008-12-26T02:17:07Z

Hi
I want to know some code about Rexcel. Please if you can respond, it will be great helpful for me. Problem is that the conversion of Excel (type of) variable to R (type of) variable. Suppose I have written the code in VBA.

Option Base 1
Sub test()
Dim x(5) As Integer
x(1) = 10
x(2) = 20
x(3) = 30
x(4) = 40
x(5) = 50

RInterface.StartRServer

RInterface.RRun "Nt<- x[3]" 'I want to store 3rd element of an array by using R
'& also if possible I want to show this value by msgbox
RInterface.StopRServer
End Sub

I think x() array is an Excel type and we will have to convert it to R type of array i.e. vector. The question is How?
and again I want to perform some action on 'Nt' through excel VBA, then again we will have to convert this R type of Variable to Excel type.
Am i right?
Please suggest me some way how to do these things.

R-(D)COM, using custom R functions from Matlab

2008-09-04T13:59:32Z

Hello,

I'm a very new Matlab user, and a 3-year user of R.

I need to run custom R functions from Matlab. So far I have been able to:

open an R session from Matlab, write R functions using, for example, evalR('test = function(x){ x + 2}'). However, I need to use the R source() command from Matlab to access longer custom R functions (those that will not fit on one line), but when I try:

evalR('source(''test.r'')') for example, I get the following error...

??? Error using ==> evalR at 58
Problem evaluating command source('test.r').
Invoke Error, Dispatch Exception: Object is static; operation not allowed

Any insight in to this problem would be appreciated.

Also, I was wondering how (at the Matlab command prompt) to extend a single command across two or more lines so as to be able to write longer R functions using the evalR link from the command line?

Thanks for the help!

Smjorvi

Automation R on VB .Net

2007-11-15T08:57:20Z

Hello,
I want to automize the calling of a function on VB for different paths. The library of R do not appear on VB. Someone could help me please?