R / Arcgis Repository

 

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Introduction
How to use R with Arcgis ?
Contributions
FAQ
How to contribute ?

Introduction

  • What is R ?
    R is a language and environment for statistical computing and graphics. It's a free software under the GPL which can be download form CRAN.
    It provides a large variety of statistical models for general data analysis. Several packages are dedicated to the problem of spatial data. [Read more about R]
  • What is Arcgis ?
    ArcGIS is a Geographical Information System family of software products that form a complete GIS built on industry standards. ArcGIS is a complete, single, integrated system for geographic data creation, management, integration, and analysis.

How to use R with Arcgis ?

It's very simple, just follow this procedure:

  1. Launch Arcmap.
  2. Create a new map or import a previous one.
  3. Name and Save your project (Let's call it "My Project")
  4. Launch the Visual Basic editor [screenshot]
  5. Select all the references corresponding to the R DCOM server [screenshot1] [screenshot2]

Congratulations, you are now able to use the objects provided by the server !
To test your installation, you need to:

  1. Create a VBA form in "My Project.mxd" by inserting a User Form [screenshot]
  2. Create a button "CommandButton1" in the form, double click on it and Copy/Paste the following code in the callback:


    Private Sub CommandButton1_Click()
    Dim RLink As StatConnector
    Dim mean As Double
    Dim n As Long

    n = 150
    Set RLink = New StatConnector
    RLink.Init ("R")
    RLink.SetSymbol "n", n
    RLink.EvaluateNoReturn ("x <- rnorm(n,5,2)")
    ' mean = RLink.GetSymbol("mean(x)") Incorrect: mean(x) is not a symbol
    RLink.EvaluateNoReturn ("m <- mean(x)")
    mean = RLink.GetSymbol("m")
    RLink.Close
    MsgBox "The mean is " & mean, vbOKOnly, "Powered by R"
    End Sub

If you get a message box, everything is probably ok !

Contributions

  • The previous demo [link]
  • Create a Raster Layer (log (redBand + 1)) from an existing raster layer in Arcgis [link]

FAQ

How to contribute ?
Page maintained by C. Saint-Jean and R.Bivand