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The Number of Rows / Columns of an Array

Syntax

nrow(x)
ncol(x)
NCOL(x)
NROW(x)

Arguments

x array or data.frame

Description

nrow and ncol return the number of rows or columns present in x. NCOL and NROW do the same, but treat a vector as 1-column matrix.

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