Question

How to extract a single column from data frame in R

Answer 1

df <- data.frame(a = c(1, 3, 9, 0),
                 b = c(12, 98, 90, 20),
                 c = c(2, 4, 6, 8),
                 row.names = c('o', 'p', 'q', 'r'))

print(df)

column = data.frame(df$b)

print(column)
    
    
    
      
      
# run:
#
#   a  b c
# o 1 12 2
# p 3 98 4
# q 9 90 6
# r 0 20 8
#   df.b
# 1   12
# 2   98
# 3   90
# 4   20
# 

 

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