Changing row and column values of a Matrix in R Language – sweep() function

sweep() function in R Language is used to apply the operation “+ or -” to the row or column in data matrix.
It is used to sweep the values from the data-framework.

Syntax:
sweep(x, MARGIN, STATS, FUN)

Parameters:
x: Typically a matrix.
MARGIN: MARGIN = 1 means row; MARGIN = 2 means column.
STATS: the value that should be added or subtracted
FUN: The operation that has to be done (e.g. + or -)

Example 1: Sweep Matrix

filter_none

edit
close

play_arrow

link
brightness_4
code

# R program to illustrate
# sweep matrix
  
# Create example matrix
data <- matrix(0, nrow = 6, ncol = 4)           
  
# Apply sweep in R
data_ex1 <- sweep(x = data, MARGIN = 1, STATS = 5, FUN = "+")  
  
# Print example 1
print(data_ex1)  
                               

chevron_right


Output:



     [,1] [,2] [,3] [,4]
[1,]    5    5    5    5
[2,]    5    5    5    5
[3,]    5    5    5    5
[4,]    5    5    5    5
[5,]    5    5    5    5
[6,]    5    5    5    5

Here in the above code, the value of the matrix was 0, which was then sweeped by the sweep() function and the new value of the matrix became 5.

Example 2: Using sweep() with stats

filter_none

edit
close

play_arrow

link
brightness_4
code

# R program to illustrate
# sweep funtion with stats
  
# Create example matrix
data <- matrix(0, nrow = 6, ncol = 4)           
  
# Sweep with Complex STATS
data_ex2 <- sweep(x = data, MARGIN = 1,                       
                  STATS = c(1, 2, 3, 4, 5, 6), FUN = "+")
  
# Print example 2 
print(data_ex2)                                                       

chevron_right


Output:

     [,1] [,2] [,3] [,4]
[1,]    1    1    1    1
[2,]    2    2    2    2
[3,]    3    3    3    3
[4,]    4    4    4    4
[5,]    5    5    5    5
[6,]    6    6    6    6

Here in the above example, we have used the sweep() function along with the stats.




My Personal Notes arrow_drop_up

Recommended Posts:


Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.


Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.