# Groups explaining grouping on NMDS plot?

**URL:** <https://forum.mothur.org/t/groups-explaining-grouping-on-nmds-plot/20997>\
**Category:** Commands in mothur\
**Created:** [May 24, 2021, 3:14pm UTC](https://forum.mothur.org/t/groups-explaining-grouping-on-nmds-plot/20997 "2021-05-24T15:14:22Z")\
**Posts on this page:** 1\
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**Author:** ![MaximeG](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.mothur.org/maximeg/32/397_2.png) [@MaximeG](https://forum.mothur.org/u/MaximeG)\
**Post date:** [May 28, 2021, 10:15am UTC](https://forum.mothur.org/t/groups-explaining-grouping-on-nmds-plot/20997/9 "2021-05-28T10:15:42Z")

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Pat, if I understand you well, I should get rsq\_1 \< rsq\_2 \< rsq\_3 (and not the other way around as I wrote above). But I get rsq\_1 \< rsq\_3 \< rsq\_2.

This is very briefly discussed in an older forum post ([https://forum.mothur.org/t/pcoa-r-squared-error/1573](https://forum.mothur.org/t/pcoa-r-squared-error/1573)) but in my case not so many distances are close to 1.

According to which criterion shall I select which OTUs (out of the 9083) to plot on the biplot? The length? The p-value (and if so, 1, 2 or 3)?

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