If the index is so important to you, you should have included an index (ID number, city name, date, etc) for it, instead of relying on the "row number" output on the fly.
On Mon, Aug 24, 2015 at 6:28 PM, Robert Smith <[email protected]> wrote: > In my opinion, when you did `df[20:50,:]`, you constructed a new >> DataFrame, which had no longer anything to do with the original `df`. So >> you cannot expect it to know the original position in `df`. And when you >> print it, the row number (instead of index) is generated on the fly, just >> let you know which value is at which line of the output. >> >> I think what needed here is just a formatted `print()` for DataFrame, >> which can toggle the row number index. >> > > When I do `df[20:50,:]`, the result is a subset of the original DataFrame > `df`, so I should expect to keep track of the index in `df`. It doesn't > take much to see why that is useful (an index often refers to a person, > geographical entity, discrete period of time, etc). >
