Getting a Matrix of number of rows in R Programming – row() Function
In this article, we will discuss how to find the number of rows and columns in a matrix in R Programming Language.
nrow() Function in R
nrow()
function in R Language is used to get the row number of a matrix.
Syntax:
row(x, as.factor=FALSE)
Parameters:
x: matrix
as.factor: a logical value indicating whether the value should be returned as a factor of column labels (created if necessary) rather than as numbers
ncol()
Function in R
The ncol()
function in R is used to get the number of columns in a matrix.
Find number of rows and columns in a Basic Matrix
R
irregular_mat <- matrix (1:9,3,3)
num_rows_irregular <- nrow (irregular_mat)
num_cols_irregular <- ncol (irregular_mat)
print ( paste ( "Number of rows in irregular matrix:" , num_rows_irregular))
print ( paste ( "Number of columns in irregular matrix:" , num_cols_irregular))
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Output:
[1] "Number of rows in irregular matrix: 3"
[1] "Number of columns in irregular matrix: 3"
Find number of rows and columns in a Irregular Matrix in R
R
mat <- matrix (1:24,6,4)
mat
num_rows <- nrow (mat)
num_cols <- ncol (mat)
print ( paste ( "Number of rows:" , num_rows))
print ( paste ( "Number of columns:" , num_cols))
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Output:
[,1] [,2] [,3] [,4]
[1,] 1 7 13 19
[2,] 2 8 14 20
[3,] 3 9 15 21
[4,] 4 10 16 22
[5,] 5 11 17 23
[6,] 6 12 18 24
[1] "Number of rows: 6"
[1] "Number of columns: 4"
Last Updated :
20 Dec, 2023
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