fix R CMD checks issues #100
| Job | Run time |
|---|---|
| 7m 33s | |
| 7m 33s | |
| 6m 50s | |
| 8m 15s | |
| 10m 8s | |
| 10m 8s | |
| 11m 20s | |
| 10m 54s | |
| 9m 17s | |
| 9m 17s | |
| 9m 48s | |
| 11m 6s | |
| 9m 6s | |
| 9m 6s | |
| 11m 16s | |
| 11m 8s | |
| 10m 35s | |
| 10m 35s | |
| 10m 45s | |
| 11m 53s | |
| 6m 27s | |
| 6m 27s | |
| 5m 11s | |
| 8m 9s | |
| 5m 50s | |
| 14m 17s | |
| 14m 17s | |
| 14m 17s | |
| 5m 44s | |
| 5m 44s | |
| 5m 23s | |
| 7m 25s | |
| 6m 27s | |
| 6m 27s | |
| 5m 49s | |
| 7m 35s | |
| 5h 22m 2s |