# Changing feature name changes results in LEfSe

**URL:** <https://help.galaxyproject.org/t/changing-feature-name-changes-results-in-lefse/2989>\
**Category:** Uncategorized\
**Tags:** text-manipulation, troubleshooting, lefse\
**Created:** [February 13, 2020, 4:10pm UTC](https://help.galaxyproject.org/t/changing-feature-name-changes-results-in-lefse/2989 "2020-02-13T16:10:47Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![DrNezar](https://avatars.discourse-cdn.com/v4/letter/d/f04885/32.png) [@DrNezar](https://help.galaxyproject.org/u/DrNezar)\
**Post date:** [February 13, 2020, 4:10pm UTC](https://help.galaxyproject.org/t/changing-feature-name-changes-results-in-lefse/2989/1 "2020-02-13T16:10:47Z")

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I realized LEfSe provides different results from identical data sets in which only feature names have been modified. Compare the outputs below: the number of significant feature differ by 1 and the LDA scores changed for some features:

 ![Galaxy117-C)_Plot_LEfSe_Results_on_data_116](https://us1.discourse-cdn.com/flex020/uploads/galaxy/original/2X/a/a383fe6613237f0fe474a233b40afd3eb5593c92.png) ![Galaxy120-C)_Plot_LEfSe_Results_on_data_119](https://us1.discourse-cdn.com/flex020/uploads/galaxy/original/2X/b/b5a2c1bc8b75f5332c87fc45ce39cfd730f4b636.png)

Anyone faced the same issue?

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**Author:** ![Laura\_mason](https://sea2.discourse-cdn.com/flex020/user_avatar/help.galaxyproject.org/laura_mason/32/1921_2.png) [@Laura\_mason](https://help.galaxyproject.org/u/Laura_mason)\
**Post date:** [November 2, 2020, 7:06pm UTC](https://help.galaxyproject.org/t/changing-feature-name-changes-results-in-lefse/2989/2 "2020-11-02T19:06:34Z")

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Hi - yes I have also had this issue, but just assumed that I had made a copy-paste error. Have you sorted it out?  
Laura

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**Author:** ![hlsw2001](https://sea2.discourse-cdn.com/flex020/user_avatar/help.galaxyproject.org/hlsw2001/32/3495_2.png) [@hlsw2001](https://help.galaxyproject.org/u/hlsw2001)\
**Post date:** [July 20, 2022, 6:37am UTC](https://help.galaxyproject.org/t/changing-feature-name-changes-results-in-lefse/2989/3 "2022-07-20T06:37:45Z")

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Hi, I have also faced this problem. Have you found why that happened?

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**Author:** ![jennaj](https://sea2.discourse-cdn.com/flex020/user_avatar/help.galaxyproject.org/jennaj/32/27_2.png) [@jennaj](https://help.galaxyproject.org/u/jennaj)\
**Post date:** [July 21, 2022, 5:33pm UTC](https://help.galaxyproject.org/t/changing-feature-name-changes-results-in-lefse/2989/4 "2022-07-21T17:33:06Z")

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Hi @hlsw2001 @Laura_mason@DrNezar

The answer is cross-posted here: [the way microorganisms are named affect the final results of lefse](https://help.galaxyproject.org/t/the-way-microorganisms-are-named-affect-the-final-results-of-lefse/8337)

In short, Lefse is picky about identifier formats. Clean those up and these technical problems will likely resolve.

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**Author:** ![jennaj](https://sea2.discourse-cdn.com/flex020/user_avatar/help.galaxyproject.org/jennaj/32/27_2.png) [@jennaj](https://help.galaxyproject.org/u/jennaj)\
**Post date:** [July 21, 2022, 5:33pm UTC](https://help.galaxyproject.org/t/changing-feature-name-changes-results-in-lefse/2989/5 "2022-07-21T17:33:15Z")

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