I am following along with this tutorial but using different data:

https://www.huber.embl.de/users/klaus/Teaching/DESeq2-Analysis.pdf

I am at the independent filtering part and haven't had any issues in the previous parts. The part of the code that gives me an issue if this:

DESeq2Table<-nbinomWaldTest(DESeq2Table)
DESeq2Res<-results(DESeq2Table,pAdjustMethod="BH")
table(DESeq2Res$padj<0.1)
attr(DESeq2Res,'filterThreshold')

The 'table' line returns results indicating ~5000 DE genes and ~25500 non-DE genes. But, when running the 'attr' line of that chunk it returns a value of 'Null' and I'm not sure why. I'm also a little confused on where 'filterThreshold' comes from in the first place since I don't see anything about it in the attr rdocumentation page.

Edit: viewing the attributes from DESeq2Res I can see this:

$metadata
$metadata$filterThreshold
45.70778% 
0.3646421 

but I don't know why this isn't reported when calling attr(DESeq2Res,'filterThreshold')