# cluster cutoff bug?

**URL:** https://forum.mothur.org/t/cluster-cutoff-bug/2193
**Category:** mothur bugs
**Created:** [January 14, 2015, 1:49am UTC](https://forum.mothur.org/t/cluster-cutoff-bug/2193 "2015-01-14T01:49:33Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![gongyh](https://avatars.discourse-cdn.com/v4/letter/g/ee7513/32.png) [@gongyh](https://forum.mothur.org/u/gongyh)
#### Post date: [January 14, 2015, 1:49am UTC](https://forum.mothur.org/t/cluster-cutoff-bug/2193/1 "2015-01-14T01:49:33Z")

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I use mothur 1.33, and when i use cluster command, the cutoff changed to a small number(even with parameter hard=true).  
when i set cutoff to 0.03, i only get the unique label, when i set cutoff to 0.10, i can get labels: unique/0.01/0.02/0.03.

mothur \> cluster(column=dataset\_4444.dat,name=dataset\_4433.dat,method=average,cutoff=0.1,hard=true,precision=100)  
\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*# **#** # **#** # **#** # **#** # **#** #  
Reading matrix: |||||||||||||||||||||||||||||||||||||||||||||||||||||

* * *

changed cutoff to 0.0332595

Results:  
label numOtus  
unique 79527  
0.01 39448  
0.02 15304  
0.03 10731

In the wiki, it says “By default the cutoff parameter is set to cutoff + (5 / (precision \* 10.0)).” column parameter is my dist file, and there are distances bigger than 0.15. I want to know how the cutoff changed itself?

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<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: [January 14, 2015, 7:43pm UTC](https://forum.mothur.org/t/cluster-cutoff-bug/2193/2 "2015-01-14T19:43:39Z")

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[http://mothur.ltcmp.net/t/cluster-cutoff-problem/2192/1](http://mothur.ltcmp.net/t/cluster-cutoff-problem/2192/1)