# Fill an empty matrix in R

• Last Updated : 21 Apr, 2021

In this article, we will discuss how to fill the empty matrix with values in R Programming Language. First, let’s create an empty matrix.

Syntax:

matrix_name[row,column]=value.

Where, row and column are the numbers in which the value is occupied.

Example:

## R

 `# create empty matrix.``a<-``matrix``(nrow=4,ncol=4)`` ` `# display matrix``print``(a)`` ` `# filling empty matrix with value at ``# 2nd row and 4 th column``a[2,4]=4``print``(a)`` ` `# create empty matrix.``a<-``matrix``(nrow=4,ncol=4)`` ` `# filling empty matrix with value at ``# 4th column``a[,4]=4``print``(a)`` ` `# create empty matrix.``a<-``matrix``(nrow=4,ncol=4)`` ` `# filling empty matrix with value at ``# 4th row``a[4,]=4``print``(a)`

Output:

We can replace with same value for all empty value in a matrix, by using [,].

Example

## R

 `# create empty matrix.``a<-``matrix``(nrow=4,ncol=4)`` ` `# display matrix``print``(a)`` ` `# replace empty matrix with 5 value``a[,]=5``print``(a)`

Output:

Even a range can be inserted.

Example

## R

 `# create empty matrix.``a<-``matrix``(nrow=4,ncol=4)`` ` `# display matrix``print``(a)`` ` `# replace empty matrix with  ``# 1 to 16 values``a[,]=1:16``print``(a)`

Output:

My Personal Notes arrow_drop_up