Reorder Levels of Factor without Changing Order of Values in R
In this article, we will discuss how to Reorder Levels of Factor without Changing the Order of Values in R programming language.
If we want to change the order of the levels, we can specify the levels() parameter in the factor() function
Syntax:
factor(actual_vector,levels)
Where,
- actual_vector is the factor input vector
- levels are the names to be specified to get in that order. levels parameter can accept the vector elements. Thus the reordering is done manually.
Example: R program to reorder the levels
R
# create a student names vector student= factor ( c ( "sravan" , "bobby" , "ojaswi" , "rohith" , "gnanesh" )) # display print (student) # change the order levels changed = factor (student, c ( "bobby" , "sravan" , "ojaswi" , "gnanesh" , "rohith" )) # display print (changed) |
Output:
[1] sravan bobby ojaswi rohith gnanesh
Levels: bobby gnanesh ojaswi rohith sravan
[1] sravan bobby ojaswi rohith gnanesh
Levels: bobby sravan ojaswi gnanesh rohith
Example: R program to reorder the levels
R
# create a student names vector student= factor ( c ( "sravan" , "bobby" , "ojaswi" , "rohith" , "gnanesh" )) # display print (student) # change the order levels changed = factor (student, c ( "sravan" , "ojaswi" , "bobby" , "gnanesh" , "rohith" )) # display print (changed) |
Output:
[1] sravan bobby ojaswi rohith gnanesh
Levels: bobby gnanesh ojaswi rohith sravan
[1] sravan bobby ojaswi rohith gnanesh
Levels: sravan ojaswi bobby gnanesh rohith