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What is the difference between ls() command and objects() command in R?
They are actually no difference between the two commands as they give the same result that is the number of objects in the current workspace. If we have five different type of objects say a data frame, a matrix, a list, a data.table object, and a vector then both the commands will give the names of these objects.
Example
Consider the below objects −
> x1<-factor(sample(LETTERS[1:4],20,replace=TRUE)) > x2<-sample(LETTERS[1:4],20,replace=TRUE) > df1<-data.frame(x1,x2) > df1
Output
x1 x2 1 A A 2 D A 3 C D 4 A A 5 B C 6 B D 7 D D 8 D C 9 B D 10 B A 11 D B 12 A D 13 C B 14 C C 15 C D 16 B A 17 B A 18 A C 19 C A 20 D B
Example
> y1<-rnorm(20) > y2<-rnorm(20) > df2<-data.frame(y1,y2) > df2
Output
y1 y2 1 0.65071307 1.02378223 2 -0.44122486 -0.87234919 3 1.04794035 1.04320326 4 0.01344608 -1.46007611 5 -0.34406863 1.61176666 6 0.62468548 -0.17394132 7 1.82751243 -0.13258166 8 -0.41707184 -0.09495451 9 1.16060850 -0.14671270 10 0.64134066 -0.78741462 11 1.24223245 1.14711590 12 -1.40133979 -0.63125311 13 -0.20832436 -0.18808274 14 -0.44245563 -0.40374874 15 1.00301606 0.95478376 16 1.04774024 -0.69940470 17 0.32013637 0.37317010 18 1.23054882 1.13829073 19 -0.28731032 0.60972393 20 1.28277393 1.45851332
Example
> z1<-rpois(20,5) > z2<-rpois(20,5) > df3<-data.frame(z1,z2) > df3
Output
z1 z2 1 4 3 2 10 11 3 7 4 4 1 4 5 9 3 6 2 6 7 4 6 8 4 5 9 3 5 10 0 2 11 2 5 12 5 9 13 4 7 14 3 1 15 4 7 16 5 3 17 3 6 18 9 4 19 6 6 20 9 7
Example
> List<-list(x1,y1,z1) > List
Output
[[1]] [1] A D C A B B D D B B D A C C C B B A C D Levels: A B C D [[2]] [1] 0.65071307 -0.44122486 1.04794035 0.01344608 -0.34406863 0.62468548 [7] 1.82751243 -0.41707184 1.16060850 0.64134066 1.24223245 -1.40133979 [13] -0.20832436 -0.44245563 1.00301606 1.04774024 0.32013637 1.23054882 [19] -0.28731032 1.28277393 [[3]] [1] 4 10 7 1 9 2 4 4 3 0 2 5 4 3 4 5 3 9 6 9
Example
> ls()
Output
[1] "df1" "df2" "df3" "List" "x1" "x2" "y1" "y2" "z1" "z2"
Example
> objects()
Output
[1] "df1" "df2" "df3" "List" "x1" "x2" "y1" "y2" "z1" "z2"
Updated on: 04-Jan-2021
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