| nrow {base} | R Documentation |
The Number of Rows/Columns of an Array
Description
nrow and ncol return the number of rows or columns
present in x.
NCOL and NROW do the same treating a vector as
1-column matrix.
Usage
nrow(x)
ncol(x)
NCOL(x)
NROW(x)
Arguments
x |
a vector, array or data frame |
Value
an integer of length 1 or NULL.
See Also
dim which returns all dimensions;
array, matrix.
Examples
ma <- matrix(1:12, 3, 4)
nrow(ma) # 3
ncol(ma) # 4
ncol(array(1:24, dim = 2:4)) # 3, the second dimension
NCOL(1:12) # 1
NROW(1:12) # 12