Getting a Matrix of number of columns in R Programming - col() Function

Naming Rows and Columns of a Matrix in R Programming - rownames() and colnames() Function

Last Updated : 05 Jun, 2020

rownames() function in R Language is used to set the names to rows of a matrix.

Syntax: rownames(x) <- value Parameters: x: Matrix value: Vector of names to be set

Example:

Python3 1==

# R program to provide a name
# to rows of a Matrix
   
# Creating a 3X3 Matrix
A = matrix(c(1, 2, 3, 4, 5, 6, 7, 8, 9), 3, 3, byrow = TRUE) 

# Calling rownames() Function
rownames(A) <- letters[1:3]

print(A)

Output:

  [, 1] [, 2] [, 3]
a    1    2    3
b    4    5    6
c    7    8    9

colnames() Function

colnames() function in R Language is used to set the names to columns of a matrix.

Syntax: colnames(x) <- value Parameters: x: Matrix value: Vector of names to be set

Example:

Python3 1==

# R program to provide a name
# to columns of a Matrix
   
# Creating a 3X3 Matrix
A = matrix(c(1, 2, 3, 4, 5, 6, 7, 8, 9), 3, 3, byrow = TRUE) 

# Calling colnames() Function
colnames(A) <- letters[1:3]

print(A)

Output:

      a    b    c
[1, ] 1    2    3
[2, ] 4    5    6
[3, ] 7    8    9

Getting a Matrix of number of columns in R Programming - col() Function

N

nidhi_biet

Improve

Article Tags :

Similar Reads

Calculate the Sum of Matrix or Array columns in R Programming - colSums() Function

colSums() function in R Language is used to compute the sums of matrix or array columns. Syntax: colSums (x, na.rm = FALSE, dims = 1) Parameters: x: matrix or array dims: this is integer value whose dimensions are regarded as â€˜columnsâ€™ to sum over. It is over dimensions 1:dims. Example 1: Python3 #

Compute the Sum of Rows of a Matrix or Array in R Programming - rowSums Function

rowSums() function in R Programming Language is used to compute the sum of rows of a matrix or an array. It simplifies the process of calculating the sum for each row, especially when dealing with large datasets, and can be applied to both numeric and logical data types.Syntax:rowSums(x, na.rm = FAL

Calculate the Mean of each Column of a Matrix or Array in R Programming - colMeans() Function

colMeans() function in R Language is used to compute the mean of each column of a matrix or array. Syntax: colMeans(x, dims = 1) Parameters: x: array of two or more dimensions, containing numeric, complex, integer or logical values, or a numeric data frame dims: integer value, which dimensions are r

Getting a Matrix of number of columns in R Programming - col() Function

col() function in R Language is used to get a matrix which contains the number of columns of the matrix passed to it as argument. Syntax: col(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

Scale the Columns of a Matrix in R Programming - scale() Function

The scale() function in R is used to center and/or scale the columns of a numeric matrix. It helps standardize data by transforming it to have a mean of 0 and standard deviation of 1 .Syntax scale(x, center = TRUE, scale = TRUE) Parameters: x: represents numeric matrix .center: represents either log

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 Rnrow()Â function inÂ R LanguageÂ is used to get the row number of a matrix. Syntax:Â row(x, as.factor=FALSE) Parameters:x:Â matrixas.factor:Â a logical value indicating w

Get or Set Dimensions of a Matrix in R Programming - dim() Function

The dim() function in R is used to get or set the dimensions of an object. This function is particularly useful when working with matrices, arrays, and data frames. Below, we will discuss how to use dim() to both retrieve and set dimensions, with examples for better understanding.Syntax: dim(x)Param

Get Transpose of a Matrix or Data Frame in R Programming - t() Function

t() function in R Language is used to calculate transpose of a matrix or Data Frame. Syntax: t(x) Parameters: x: matrix or data frame Example 1: Python3 # R program to illustrate # t function # Getting R Biochemical Oxygen Demand Dataset BOD # Calling t() function t(BOD) Output: Time demand 1 1 8.3

Remove names or dimnames from an Object in R Programming - unname() Function

unname() function in R Language is used to remove the names or dimnames from an Object. Syntax: unname(x) Parameters: x: Object Example 1: Python3 1== # R Program to remove names from an object # Creating a matrix A = matrix(c(1:9), 3, 3) # Naming rows rownames(A) = c("a", "b",

Convert an Object into a Matrix in R Programming - as.matrix() Function

The as.matrix() function within R converts objects of various classes into a matrix. This can be helpful to work with structures of various data that can be converted into the matrix structure so that it becomes easier to analyze.Syntax: as.matrix(x)Parameters: x: Object to be convertedExample 1: Co