LRT lesson refers to objects created in previous lessons which students may not have loaded up

[hwick]

dds_lrt is originally created in Multiple test corrections with: dds_lrt <- DESeq(dds, test="LRT", reduced = ~ 1) Is referred to later in the LRT lesson

rld_mat is originally created in Visualizations self learning:

rld <- rlog(dds, blind=T)
rld_mat <- assay(rld)

Is referred to later in the in LRT lesson

We should either add a note for how to recreate the objects, or instruct students to save (and load) their environment for each lesson. I think it is easier to just add a note for how to recreate the objects since environments can get confusing and might be conceptually new for students (we don't introduce the concept)