John Chandler wrote:
Dear R-Help,
I've never had any trouble importing data into R until I had to import an .sdd file for a class. The file can be found here: http://www.math.umt.edu/steele/Math%20549/Farms.sdd. It begins with the line "## Dump S Version 4 Dump ##". I first attempted read.S which issued the message "not an S object". I then checked the Import/Export manual which seemed to indicate that data.restore might do the trick. Alas, it seems that function is trying to interpret the name of the data frame as an S mode or some such thing.
Searched the archives (courtesy of Dr. Baron) and found this from Dr. Ripley: ".sdd files from S-PLUS 6.0 are S4 dumps, and will not work." This was written in 2002, is it still accurate? Right now my only obvious course of action is to get on a machine that has S+, read in this file and dump it in a more useful format. Are their others?
Yes, it is still accurate. If you load the file in S-PLUS then do a data.dump with oldStyle = TRUE then you should be able to use data.restore in R quite easily. If you don't have access to S-PLUS I'm sure someone on this list (including myself) would be happy to do the conversion for you.
--sundar
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