Answers for "how to get certain count of data in column r"

R data.frame count items in column

setNames(as.data.frame(table(df1$asa)), c("asa", "n"))
#   asa    n
#1   aa    3
#2   bb    2
#3   cc    1
#4   dd    1

Posted by: Guest on November-22-2021

count number of columns in r

ncol(df)

Posted by: Guest on April-03-2021

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