UTF-8 LC_NAME=C
> [9] LC_ADDRESS=C LC_TELEPHONE=C
> [11] LC_MEASUREMENT=es_ES.UTF-8 LC_IDENTIFICATION=C
>
> time zone: Europe/Madrid
> tzcode source: system (glibc)
>
> attached base packages:
> [1] stats4stats graphics grDevices utils dataset
SCE inherits from SE, but not vice versa. So setting the class union on SCE
(not SE) will do the trick. Briefly, Anything defined on an SCE will work
upstream (SE), but anything defined on SE will not work downstream (SPE, SCE).
***
This works:
library("Matrix")
library("Biobase")
library("Sum