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Revision of errors from Tue, 09/01/2009 - 20:13

Revisions allow you to track differences between multiple versions of your content, and revert back to older versions.

general strategies for locating errors

  • Use the traceback() function in R after an error occurs.It will print out the sequence of function calls that lead to the error.

argument is missing, with no default

Variations include:
Error in : argument is missing, with no default

Typical cause: A leading or trailing comma in your code makes R think that you wanted to pass in a parameter, but left it empty (hence "missing, with not default")

leading comma

trailing comma
nrow=3,ncol=3,free=TRUE, values=.5,

Cure: remove the errant comma