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How to convert values greater than a threshold into 1 in R data frame column?
To convert values greater than a threshold into 1 in R data frame column, we can follow the below steps −
First of all, create a data frame.
Then, use ifelse function to convert values greater than a threshold into 1.
Example
Create the data frame
Let’s create a data frame as shown below −
x<-sample(1:10,25,replace=TRUE) df<-data.frame(x) df
Output
On executing, the above script generates the below output(this output will vary on your system due to randomization) −
x 1 1 2 7 3 5 4 1 5 6 6 1 7 1 8 9 9 2 10 5 11 8 12 10 13 7 14 2 15 6 16 7 17 1 18 6 19 9 20 9 21 3 22 9 23 10 24 1 25 7
Convert values greater than a threshold to 1
Using ifelse function to convert values greater than a threshold into 1 in column x of data frame −
x<-sample(1:10,25,replace=TRUE) df<-data.frame(x) df$x<-ifelse(df$x>5,1,df$x) df
Output
x 1 1 2 1 3 5 4 1 5 1 6 1 7 1 8 1 9 2 10 5 11 1 12 1 13 1 14 2 15 1 16 1 17 1 18 1 19 1 20 1 21 3 22 1 23 1 24 1 25 1
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