# using trump=. in filter.seqs()

**URL:** <https://forum.mothur.org/t/using-trump-in-filter-seqs/1110>\
**Category:** Commands in mothur\
**Created:** [October 30, 2012, 4:09pm UTC](https://forum.mothur.org/t/using-trump-in-filter-seqs/1110 "2012-10-30T16:09:27Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![newbie](https://avatars.discourse-cdn.com/v4/letter/n/dc4da7/32.png) [@newbie](https://forum.mothur.org/u/newbie)\
**Post date:** [October 30, 2012, 4:09pm UTC](https://forum.mothur.org/t/using-trump-in-filter-seqs/1110/1 "2012-10-30T16:09:27Z")

</div>

## Hi Everyone, The output of my align.seqs() command looks like this: … … … … … … … …T-------AC—GT-AG-GGT------------------------------------------------------------------------------------------

## ----------------------------------------------------------------------------------------------------------------------------------------------------------GCG -A-G---------------------------------------------------------------------------------------------------------------------------------------------------------
  
Now when I am using filter.seqs() command with trump=. parameter I am getting only the names of the sequences in the filter.fasta file and no sequence. But without trump parameter I am getting filtered sequences. Could any one tell me why this is happening and what trump does? I thought it only removes '.' as that I provided.

Thanks!!!

---

<div class="post-metadata">

**Author:** ![pschloss](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.mothur.org/pschloss/32/4_2.png) [@pschloss](https://forum.mothur.org/u/pschloss)\
**Post date:** [November 1, 2012, 9:46am UTC](https://forum.mothur.org/t/using-trump-in-filter-seqs/1110/2 "2012-11-01T09:46:27Z")

</div>

Do you understand how filter.seqs(trump=.) works? Please see the filter.seqs page. You need to run screen.seqs, with the appropriate parameters, before running filter.seqs.