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2009 Oct 29
0
What is the best way to efficiently construct a data frame from multiple source files?
I have an arbitrary number of spreadsheets that I want to consolidate into a single data frame. The spreadsheets all have the same structure: location, depth1Reading, depth2reading, depth3reading, depth4reading, depth5reading The spreadsheets have their reading date in their file name. This gets parsed out and added to the data frame as a factor. The file name gets recorded in the data frame as a reference factor. The depth readings are put into a normal form in the data frame. The target data fr...