Unlist a data frame by rows, not columns

by

We can take the transpose (t) of the dataset and then use c to get a vector output

 c(t(df1))
 #[1] 0 0 0 1 1 0 1 0 1 1 2 1 1 0 3

By doing transpose, we convert the ‘data.frame’ to ‘matrix’. In both data.frame or matrix, unlist/c operations happen columnwise. So, transposing swaps the columns for rows and viceversa and we get the expected result.

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