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news item for removing split.data.table export #3083

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Merged
mattdowle merged 1 commit into from
Sep 28, 2018
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news item for removing split.data.table export #3083

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6 changes: 6 additions & 0 deletions NEWS.md
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2. Some namespace changes have been made with respect to melt, dcast and xts. No change is expected but if you do have any trouble, please file an issue.

3. `split.data.table` was exported in v1.11.6 in addition to being registered using `S3method(split, data.table)`. The export has been removed again. It had been added because a user said they found it difficult to find, [#2920](https://github.com/Rdatatable/data.table/issues/2920). But S3 methods are not normally exported explicitly by packages. The proper way to access the `split.data.table` method is to call `split(DT)` where `DT` is a `data.table`. The generic (`base::split` in this case) then dispatches to the `split.data.table` method. v1.11.6 was not on CRAN very long (under 1 week) so we think it's better to revert this change quickly. To know what methods exist, R provides the `methods()` function.
```
methods(split) # all the methods for the split generic
methods(class="data.table") # all the generics that data.table has a method for (47 currently)
```


### Changes in v1.11.6 (on CRAN 19 Sep 2018)

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