R - Dimension (Dim)

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dim function

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Example

df = data.frame(col1=1:5,col2=5:1,col3=6:10)
df

col1 col2 col3
1    1    5    6
2    2    4    7
3    3    3    8
4    4    2    9
5    5    1   10

dim(df)

[1] 5 3