How to subset String object in R

Question

I have an AAString () object like below, how can I subset for multiple positions?

df <- AAString("HAKTKIDLTBI")
df

11-letter AAString object
seq: HAKTKIDLTBI

I want to subset for :

substring(df,c(1,3,4,10))

Output:

seq: HKTB

Answer 1

You can use standard indices

df <- AAString("HAKTKIDLTBI")
df[c(1,3,4,10)]
##  4-letter AAString object
##  seq: HKTB