Ott, I think "save.table" is a great idea! I have a couple minor suggestions: 1) Personally my defaults would be sep="\t", na="NA", and col.names=(!append), that is, do not repeat column names if you're appending to an existing file (which presumably already has them at the top). 2) An option "digits" would be great, allowing you to specify the maximum digits after the decimal place. "digits" might be a single number (applies to all numeric fields), a vector (length = number of columns in x), or a list (whose names corresponded to the names of x you wanted to influence). The C code would simply round numbers to that many places; see src/nmath/fround.c for code that already does this. 3) I happen to like lists that are not officially dataframes; I'm glad to see that save.table works just fine on these (you really test for "list", not "dataframe"). I'd be willing to work on #2 with you if you'd like.
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