FPKM in DESeq2

[rondon]

Hi guys, I'm using DESeq2. I'd like to see the FPKM, and It should be easy as
> my_fpkm <- fpkm(dds)
But I need do merge the genes sizes data to dds, and I don't know how to do it. Can anyone help me?
I have a table with genes IDs and genes lengths.

my best regards.

[fanli]

Something like this:

mcols(dds)$basepairs <- gene_sizes[, "length"]

assuming gene_sizes is your table.

[rondon]

That's it! Thank you very much!