Back to Blog
Rcode values in r in order7/26/2023 ![]() Note that these functions preserves the type: if the input is a factor, the output will be a factor and if the input is a character vector, the output will be a character vector. ![]() This will code M as 1 and F as 2, and put it in a new column. Sorting a vector in descending order means ordering the elements from higher to lower. Recoding a Single Column in a Dataframe as an Example One column in a dataframe can be recoded using the code provided below. The second example shows how to order the rows of a data frame by one of its columns. Recoding a categorical variable The easiest way is to use revalue () or mapvalues () from the plyr package. – 10) is the lowest value of our example vector.Įxample 2: Order Data Frame Rows by Column Vector 4) is the third lowest and the second element (i.e. Definition of order() R function: The order function returns the position of each element of its input in ascending or descending order. As you can see in Figure 1, the first input element (i.e. There are three ways for ordering a list in R: sorting the elements in alphabetical order, creating a custom order, or ordering a specific list element. 8) is located at position three within our example vector.ĭefinition of rank() R function: The rank function returns the ranking position of its input. 10) is located at position two and the highest value (i.e. This will code M as 1 and F as 2, and put it in a new column. As you can see in Figure 1, the lowest value (i.e. The easiest way is to use revalue () or mapvalues () from the plyr package. 8) was returned last.ĭefinition of order() R function: The order function returns the position of each element of its input in ascending or descending order. 10) of our example vector was returned first and the highest value (i.e. ![]() As you can see in Figure 1, the lowest value (i.e. 1 The tapply function 2 How to use tapply in R 2.1 Additional arguments example: Ignore NA 3 Tapply in R with multiple factors The tapply function The R tapply function is very similar to the apply function. However, the output of each function is different.įigure 1 illustrates the functioning of the sort, order, and rank functions:įigure 1: Comparison of sort, order & rank Functions in R.ĭefinition of sort() R function: The sort function returns its input in ascending or descending order. In this tutorial you will learn how to use tapply in R in several scenarios with examples. The basic R syntax of the three functions is the same. Rank (x ) # Apply rank function # 3 1 4 2 ![]()
0 Comments
Read More
Leave a Reply. |