I have 4 different treatment combinations with all of the different variables in different columns. For examples, treatment, drought, genotype, block, date, plant. But I would like to group these within the columns and rows. Since my experimental design is in block effects, I have replicates in each of the multiple blocks. I have used dplyr and subset but I am not sure if I can list multiple things using this. So for a given treatment I would need an example such as this: all the genotype 1 in block 1, with drought and biochar as an effect.
I would need to subset the subset essentially