Empty a data.frame (keep colnames/headers only)

Question

I would like to know what is the proper way to empty a data frame in R.

I need to keep colnames only.

Example:

id | fruit
---+------------
1  | strawberry
2  | blackberry
3  | apple
4  | peer

would, after the operation, be:

id | fruit
---+------------

score 3 · Accepted Answer · answered Apr 16 '18 at 07:10

3

We can do

df <- df[FALSE, ]

#[1] id    fruit
#<0 rows> (or 0-length row.names)

answered Apr 16 '18 at 07:10

Ronak Shah

377,200
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score 3 · Answer 2 · answered Apr 16 '18 at 07:10

3

DF <- iris
str(DF[NULL,])
#'data.frame':  0 obs. of  5 variables:
#  $ Sepal.Length: num 
#$ Sepal.Width : num 
#$ Petal.Length: num 
#$ Petal.Width : num 
#$ Species     : Factor w/ 3 levels "setosa","versicolor",..:

answered Apr 16 '18 at 07:10

Roland

127,288
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191
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Empty a data.frame (keep colnames/headers only)

2 Answers2