I'm examining the TCGA dataset from the recount2 website (https://jhubiostatistics.shinyapps.io/recount/). I've downloaded one of the Summarized experiments for the prostate cancer, and have managed to extract the counts using assay(). The column names of the dataframe extracted however, whilst they look like identifiers, bear no resemblance to any identifiers in the TCGA database.
I have a separate download of clinical data, with TCGA identifiers and sample names for the same data set. How does one link up columns in the assay with known sample names?