Question

How to add multiple columns to 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)

df$x = c("r", "c#", "c", "c++")
df$y = c("python", "java", "javascript", "cobol")

print(df)



      
      
# run:
#
#   a  b c
# o 1 12 2
# p 3 98 4
# q 9 90 6
# r 0 20 8
#   a  b c   x          y
# o 1 12 2   r     python
# p 3 98 4  c#       java
# q 9 90 6   c javascript
# r 0 20 8 c++      cobol
# 

 

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