R: Call a Specific Column -


i trying pickup specific value row name , column name. have df , not allowed change column name.

     oa  ob  oc  od oa  -   e   c   g ob  c   -   j   l oc      -   od    b   b

for example, row=oa , col=ob return e, row=od , col=ob return b. have tried df["oa", "ob"] in below, didn't return anything.

are allowed subset using coordinates?

such as...

 oaob<-df[1,2]  ##this give value "e"

use name of df, , [row,col] coordinates


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