Running R scripts from VBA

Note be careful with your file locations and may need more explicit Shell dim statements....e.g. replace with these lines in your VB

Dim shell As Object   
Set shell = VBA.CreateObject("WScript.Shell")   
Dim waitTillComplete As Boolean: waitTillComplete = True   
Dim style As Integer: style = 1   
Dim errorCode As Integer   
Dim  path As String

path = """" & Cells.Range("RhomeDir") & """ """ & Cells.Range("MyRscript") & """"

errorCode = shell.Run(path, style, waitTillComplete)

where, in Excel a cell with a named reference RhomeDir contains text

C:\Program Files\R\R-3.2.3\bin\x64\rscript and

MyRscript contains text C:/Documents/Rworkings/Rscripttest.s

noting the unix R backslash and .s or .r postfix and VB replaces "" with " to give double brackets in path expression (plus further outside brackets to denote string). Also not a good idea to have spaces in your file name.

The full dim syntax of the shell command above was found by searching for VBA shell.

I put everything in a function that can be called easily. The output is the shell.run output, which is an integer:

Function to Run an R Script:

Function Run_R_Script(sRApplicationPath As String, _
                        sRFilePath As String, _
                        Optional iStyle As Integer = 1, _
                        Optional bWaitTillComplete As Boolean = True) As Integer

    Dim sPath As String
    Dim shell As Object

    'Define shell object
    Set shell = VBA.CreateObject("WScript.Shell")

    'Wrap the R path with double quotations
    sPath = """" & sRApplicationPath & """"
    sPath = sPath & " "
    sPath = sPath & sRFilePath

    Run_R_Script = shell.Run(sPath, iStyle, bWaitTillComplete)
End Function

Examples how to call:

Sub Demo()
    Dim iEerrorCode As Integer
    iEerrorCode = Run_R_Script("C:\Program Files\R\R-3.4.4\bin\x64\rscript","C:\Ibos\R\WF_Metrics\Abe.R")
End Sub

OR

Sub Demo()
    Dim iEerrorCode As Integer
    Dim WS as WorkSheet

    Set WS=ThisWorkBook.Worksheets("Sheet1")
    iEerrorCode = Run_R_Script(WS.Range("A1"),WS.Range("A2")) 'cell A1=adderess of R application and cell A2 is the address of your R file, one can use a named range too
End Sub

Public Sub RunRTest()
  Shell ("Rscript test.r")
End Sub