Group creation with RCC files

[Flash1593]

I have total 44 RCC files from two groups - LA (22) & TNBC (22) having 77 genes expression values. I wanted to assign them in two groups for downstream analysis using this command

groups <- c("LA","TNBC")
my_cutoff = 77
nanoR::plotGroupBoxplot(test, groups, title="Boxplot, countCutoff = my_cutoff")

But it gives me this error along with the plot of two groups with all samples mixed in each group.

Using as id variables
Warning message:
In if (is.na(groups)) { :
the condition has length > 1 and only the first element will be used

How do I assign samples to groups in R analysis?

[arcolombo]

groups = c(rep("LA",22),rep("TNBC",22)) according to the RCC files that are read in together.