# How to remove sequences according to their abundance?

**URL:** <https://forum.mothur.org/t/how-to-remove-sequences-according-to-their-abundance/1986>\
**Category:** Commands in mothur\
**Created:** [August 22, 2014, 4:54pm UTC](https://forum.mothur.org/t/how-to-remove-sequences-according-to-their-abundance/1986 "2014-08-22T16:54:24Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![lionelbrazier](https://avatars.discourse-cdn.com/v4/letter/l/94ad74/32.png) [@lionelbrazier](https://forum.mothur.org/u/lionelbrazier)\
**Post date:** [August 22, 2014, 4:54pm UTC](https://forum.mothur.org/t/how-to-remove-sequences-according-to-their-abundance/1986/1 "2014-08-22T16:54:24Z")

</div>

when I check the summary file before or after pre.cluster command, I realize that over 60% of my sequences are present in only one copy.  
How to remove these sequences? Is it the diff option in pre.cluster command?

---

<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:** [August 22, 2014, 8:59pm UTC](https://forum.mothur.org/t/how-to-remove-sequences-according-to-their-abundance/1986/2 "2014-08-22T20:59:50Z")

</div>

Not that we recommend using this, but it’s there…

[http://www.mothur.org/wiki/Split.abund](http://www.mothur.org/wiki/Split.abund)