I am trying to make UpSetR plot for nine vcf files using [working code][1]. However, the output plot shows only five files out of total nine files.


  [1]: https://www.biostars.org/p/379679/#379721
Try increasing `nsets` when calling `upset`, like:

```
upset(fromList(read_sets), order.by = "freq", nsets = 9)
```

`?upset` shows:
>nsets	Number of sets to look at