Hello.  Is it possible to analyze a continuous phenotype with DESeq2, without grouping into factors?  I receive this note when I run the default DESeq function:

-- note: fitType='parametric', but the dispersion trend was not well captured by the
   function: y = a/x + b, and a local regression fit was automatically substituted.
   specify fitType='local' or 'mean' to avoid this message next time.