Why do ncol and nrow only yield NULL when I do have data?

Vote count:

0

I am new to R, so most likely this is a silly question. Every time I create artificial data, and sometimes using imported data sets, R tells me my variables have no rows or columns. I can run regressions but I cannot base commands on the number of rows/columns my variables have. For instance, say I have a variable x1, which is a column vector of 100 observations.

ncol(x1)

NULL

nrow(x1)

NULL

However, if I do this:

x=t(x) x=t(x)

and type again ncol(x), nrow(x), then I get the actual number of columns, rows that the object has.

Why is this happening and how can I fix this without having to use t()?

asked 18 secs ago

Goose

1

Why do ncol and nrow only yield NULL when I do have data?