There were 50 or more warnings (use warnings() to see the first 50) run with FEAST

[timeresistance1996]

I use the example files metadata_example_multi.txt and otu_example_multi.txt to test, except "There were 50 or more warnings" everything is normal, one of the warning is ：
"1: In if (!is.element(class(x), c( "matrix", "data.frame", ... :the condition has length > 1 and only the first element will be used"
I also got a result file, has anyone encountered this situation, this way Is the demo file available?

[Asa12138]

I found the problem comes from the FEAST_rarefy function， is.element(class(x), c("matrix", "data.frame", "array")) will return 2 bool values but if() only needs one.

> class(x)
[1] "matrix" "array" 

I don't why class() will give two types, very strange. Maybe R4.2.0 the class() function changes.
so I modify the FEAST_rarefy(), delete the line 5. I think that won't change my result
Hope authors can fix this problem, Thanks @liashenhav @kant

[liashenhav]

The 'FEAST_rarefy' function now revised. Please re-run your analysis