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This is crazy, and just out of intellectual curiosity: Can I run a function in R in such a way that after the function completes I can get all variables created when the function executed? So the ability to look into a function right before it returned? I don't mean entering the function in debug mode.
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You can use ls() to list all variables that are created in the environment. Use ls() to display all variables. pat = " " is used for pattern matching such as ^, $, ., etc.
Getting type of different data types in R Programming – typeof() Function. typeof() function in R Language is used to return the types of data used as the arguments.
To save data as an RData object, use the save function. To save data as a RDS object, use the saveRDS function. In each case, the first argument should be the name of the R object you wish to save. You should then include a file argument that has the file name or file path you want to save the data set to.
If you want to just view the variable's contents, you can try clicking the icon on the right side of the workspace, e.g. Clicking on that icon at the right would open the mtcars dataset in the Data Viewer.
To get all variables and their values as a list you could use the last line of the function in this example:
myFunction=function(){
a="lolcat"
b=data.frame(firstCol=1:3,secondCol=letters[1:3])
d=list()
d[["someName"]]=10:13
sapply(ls(),function(x)get(x),simplify=F,USE.NAMES=T)
}
myResults=myFunction()
myResults
Output:
$a
[1] "lolcat"
$b
firstCol secondCol
1 1 a
2 2 b
3 3 c
$d
$d$someName
[1] 10 11 12 13
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