Currently, resample expects a csv file or dataframe as input and writes only csv files as output.

Allow filetypes with delimiters other than a comma to be read by resample and then written out. Possibly a "sep" argument during the read step and a "sep" argument for writing out files using another dellimiter. This would make resample a more generic function for resampling with replacement and stratification.

resample.data.frame now uses write.table not write.csv, but sets up a csv scenario by default.