[R] Help with Error Message

[Patrick Richardson]

Hoping someone can offer me some assistance.  I'm trying to execute a script
and I keep getting this error message about "Error: element 12 is empty".
I'm wondering if my syntax is incorrect within legend.list.  If anyone has
any suggestions to sees something obvious that I am missing, I would greatly
appreciate any help.

Many Thanks,

Patrick

> # These are the symbols and colors to use for each phenotype in the model
and test sets 
> #          model samples:   square symbols
> #                  color         symbol      phenotype
> legend.list <- c("green",         22,        # ALL-B 
+                  "steelblue",     22,        # ALL-T 
+                  "red",           22,        # AML   
+ #          test samples:    cicle symbols
+ #                  color         symbol      phenotype                 
+                  "lightgreen",    21,        # ALL-B 
+                  "lightblue",     21,        # ALL T 
+                  "orange",        21,        # AML 
+                 )
Error: element 12 is empty;
   the part of the args list of 'c' being evaluated was:
   (22, "steelblue", 22, "red", 22, "lightgreen", 21, "lightblue", 21,
"orange", 21, )
> 
> col <- legend.list[seq(1, length(legend.list), 2)]
Error: object "legend.list" not found
> symbs <- as.numeric(legend.list[seq(2, length(legend.list), 2)])
Error: object "legend.list" not found