How many populations can I compare at one time?

[kzd0007]

I'm getting error code: Error in eigen(sigma/c.scale) : infinite or missing values in 'x'

when I try to do SEA for more than 4 groups in a single community. Is 4 the limit?

[AndrewLJackson]

Hi No there should not be a limit. Do all of your groups have at lease 3 distinct data points? Which would be the absolute minimum to calculate the ellipse statistics? Best wishes Andrew

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Dr Andrew Jackson, PhD, FTCD Professor in Zoology School of Natural Sciences, Department of Zoology Trinity College Dublin, the University of Dublin Dublin 2, Ireland.

@.*** http://www.tcd.ie/Zoology/research/http://www.tcd.ie/Zoology/research/groups/jackson/groups/jackson/

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From: kzd0007 @.> Sent: Monday, March 4, 2024 6:17:34 PM To: AndrewLJackson/SIBER @.> Cc: Subscribed @.***> Subject: [AndrewLJackson/SIBER] How many populations can I compare at one time? (Issue #102)

I'm getting error code: Error in eigen(sigma/c.scale) : infinite or missing values in 'x'

when I try to do SEA for more than 4 groups in a single community. Is 4 the limit?

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[kzd0007]

Wow that's embarrassing--yep that was it! Sometimes even with less than 3 you can force it to do the ellipse (don't worry I haven't tried to publish anything with data like that--I've just done it while playing with preliminary results for things) but this data set had multiple groups with less than 3 and it did not like that.

Thank you so much!!