v0.6.0

h2o-ops released this 06 Jun 02:12

v0.6.0 — 2018-06-05

Added

fread will detect feather file and issue an appropriate error message.
when fread extracts data from archives into memory, it will now display
the size of the extracted data in verbose mode.
syntax DT[i, j, by] is now supported.
multiple reduction operators can now be performed at once.
in groupby, reduction columns can now be combined with regular or computed
columns.
during grouping, group keys are now added automatically to the select list.
implement sum() reducer.
== operator now works for string columns too.
Improved performance of groupby operations.

Fixed

fread will no longer emit an error if there is an NA string in the header.
if the input contains excessively long lines, fread will no longer waste time
printing a sample of first 5 lines in verbose mode.
fixed wrong calculation of mean / standard deviation of line length in fread
if the sample contained broken lines.
frame view will no longer get stuck in a Jupyter notebook.

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