Export to CSV does not write row names

[darkoc]

The Serialization.<V>writeCsv(final DataFrame<V> df, final OutputStream output) method doesn't write the row names if dfis a dataframe which has row names.

[cardillo]

So, turns out this writing the index is not supported by the csv library joinery uses. There is a workaround, you can add the index as a new column prior to writing the csv file:

df.add("labels", df.index()).writeCsv(...)

[donggua223344]

Hi, can you assign this issue to me?

[rfraser3]

We should have this completed in the near future

[rfraser3]

As a heads up, the proposed solution above does not work. It adds the entire index name and all values to the single cell where the column header should be.