Re: [R] R question

From: Marc Schwartz <marc_schwartz_at_comcast.net>
Date: Fri, 04 May 2007 13:30:11 -0500

On Fri, 2007-05-04 at 12:05 -0500, Bill Vorias wrote:
> I had a question about Random Forests. I have a text file with 10
> dichotomous variables and a bivariate response vector. I read this file
> into R as a data frame, and then used the command "randomForest(Response ~.,
> dataset, etc.." where "Response" is the column header of the response
> variable and "dataset" is the name of the data frame. I get an error that
> says "Response" not found. I was looking at the Iris data example in the R
> help files, and it seems like this is exactly what they did. Do you have
> any suggestions? Thanks.

R you sure that you have correctly specified the column and data frame names in the call to randomForest()?

Be sure to check for typos, including capitalization.

You can use:

  ls()

to check for the current objects in your working environment and you can then use:

  str(YourDataFrame)

or

  names(YourDataFrame)

to display information about the detailed structure and/or column names, respectively, in the data frame that you created from the imported data.

HTH, Marc Schwartz



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