Quick newbie question please:

 

I am trying to turn a dataframe into xts with the function;

 

As.xts

 

But it returns the error;

 

Error in as.POSIXlt.character(x, tz, ...) : 

  character string is not in a standard unambiguous format

 

could someone give me some pointers please

 

the data is coming from a spreadsheet via the excel function rputdataframe,
and has 3 columns of dates (excel format)

 

regards

 

glenn


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