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On loading the latest version of data.table (1.10.4) I get this message:

> library(data.table)
data.table 1.10.4
...
---------------------------------------------------------------------------------------------------------------------------------------------
data.table + dplyr code now lives in dtplyr.
Please library(dtplyr)!
---------------------------------------------------------------------------------------------------------------------------------------------

Attaching package: ‘data.table’

The following objects are masked from ‘package:dplyr’:

    between, first, last

The following object is masked from ‘package:purrr’:

    transpose

The message is not very helpful to explain why is it useful to use the dtplyr package. As far as I can see, as long as I avoid the listed conflicts I can use the data.table package normally? In fact, I can't library(dtplyr) without having the package installed, so the message itself does not provide very good instructions in this case.

Alex
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  • I think before if you were using `dplyr` functions like `group_by()` with your `data.table`s, you only needed to load `dplyr`. Now the `data.table` specific code lives in a separate package, so they need to warn existing users. If you weren't using `dplyr` features to work with `data.table`, you can probably ignore the warning. – Marius Jun 20 '17 at 00:18
  • Thanks @marius. I am still confused on which specific features are being referred to, as for example, I can pipe data tables just fine. – Alex Jun 20 '17 at 00:19
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    You can file your question at the project's github page. – Frank Jun 20 '17 at 00:35

1 Answers1

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The package dtplyr is really performant, it could really speed up the calculation when my dataframe is larger than 10^5 rows.

What I did is:

library(data.table)
library(dplyr)
library(dtplyr)

Best regards

Duck Dodgers
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long-do
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