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How to create a column of raise to the power 3 in data frames stored in R list?
To create a column of raise to the power 3 in data frames stored in R list, we can follow the below steps −
First of all, create a list of data frames.
Then, use lapply function to create a column of raise to the power 3 in data frames stored in the list.
Example
Create the list of data frames
Using data.frame function to create data frames and list function to create the list of those data frames −
df1<-data.frame(x=sample(1:50,25)) df2<-data.frame(x=sample(1:50,25)) List<-list(df1,df2) List
Output
On executing, the above script generates the below output(this output will vary on your system due to randomization) −
[[1]] x 1 40 2 45 3 29 4 33 5 17 6 10 7 44 8 23 9 6 10 28 11 18 12 27 13 21 14 25 15 5 16 1 17 35 18 50 19 34 20 41 21 16 22 22 23 24 24 8 25 39 [[2]] x 1 45 2 6 3 41 4 7 5 12 6 13 7 11 8 3 9 43 10 36 11 27 12 30 13 8 14 25 15 22 16 31 17 48 18 4 19 47 20 35 21 26 22 46 23 37 24 42 25 32
Create a column of raise to the power 3 in data frames stored in the list
Using lapply function to create a column of raise to the power 3 in data frames df1 and df2 stored in the list called List as shown below −
df1<-data.frame(x=sample(1:50,25)) df2<-data.frame(x=sample(1:50,25)) List<-list(df1,df2) lapply(List,function(x) { + x$Power3<-x$x^3 + return(x) + })
Output
[[1]] x Power3 1 40 64000 2 45 91125 3 29 24389 4 33 35937 5 17 4913 6 10 1000 7 44 85184 8 23 12167 9 6 216 10 28 21952 11 18 5832 12 27 19683 13 21 9261 14 25 15625 15 5 125 16 1 1 17 35 42875 18 50 125000 19 34 39304 20 41 68921 21 16 4096 22 22 10648 23 24 13824 24 8 512 25 39 59319 [[2]] x Power3 1 45 91125 2 6 216 3 41 68921 4 7 343 5 12 1728 6 13 2197 7 11 1331 8 3 27 9 43 79507 10 36 46656 11 27 19683 12 30 27000 13 8 512 14 25 15625 15 22 10648 16 31 29791 17 48 110592 18 4 64 19 47 103823 20 35 42875 21 26 17576 22 46 97336 23 37 50653 24 42 74088 25 32 32768
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