Hi R-users
I am having troubles accessing elements after the $ symbol. Reproducible
example:
>test <- data.frame (first=1:10, second=11:20, third=21:30)
>test$first #this works fine
but when I try
>interest <- "first"
>test$interest # does not seem to work
Could you tell me why that happens and show how to do instead?
Thanks so much
Lorenzo
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