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Posted to dev@zeppelin.apache.org by "Michael Chirico (JIRA)" <ji...@apache.org> on 2018/03/28 10:31:00 UTC

[jira] [Created] (ZEPPELIN-3370) display of data.table objects has poor alignment

Michael Chirico created ZEPPELIN-3370:
-----------------------------------------

             Summary: display of data.table objects has poor alignment
                 Key: ZEPPELIN-3370
                 URL: https://issues.apache.org/jira/browse/ZEPPELIN-3370
             Project: Zeppelin
          Issue Type: Bug
          Components: Interpreters
    Affects Versions: 0.7.3
            Reporter: Michael Chirico


Library `data.table`'s default print method intentionally truncates table output for speed, basically concatenating `head(x)` and `tail(x)`.

In Zeppelin, this leads to poor alignment:

 

```

%r
library(data.table)
DT = data.table(a = seq_len(1e6))

DT

```

 

I suspect this is the same issue as plagues matrix printing since `data.table` converts the object to be printed to a `matrix` first:

 

```
%r
m = matrix(NA, 1e4, 10)
m
```



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