For a study in GEO, I would like to obtain the data table header descriptions, specifically the "VALUE" column for all samples in the study.

I tried using assayData() from the Biobase package but I didn't know whether the method takes a sample, a matrix of samples, or something else as a parameter. Apparently it takes a "S4" and then returns "<environment: 0x109caa8e8="">" but I don't know how to use that information.

If there's another method that I should be using please tell me.

Thanks!