Create a data.frame with m columns and 2 rows

Question

I would like to create a data.frame in R with m (a variable) number of columns (for example 30), and 2 rows and fill all the values in the data.frame initially with 0's. It seems as though data.frame populates values based on rows rather that columns, any suggestions how I can do this? Thanks :)

Answer 1

Does m really need to be a data.frame() or will a matrix() suffice?

m <- matrix(0, ncol = 30, nrow = 2) 

You can wrap a data.frame() around that if you need to:

m <- data.frame(m) 

or all in one line: m <- data.frame(matrix(0, ncol = 30, nrow = 2))