Add list of list into a dataframe

Question

I am trying to add a list of list into a dataframe

list1<-list(1,2,3)
list2<-NA
list3<-list(1,2,3)

list<-list(list1,list2,list3)

Mydata<-data.frame(x=NA,y=NA)

Would like to produce

x  y  
NA list  

Answer 1

1 row result

If you are looking to maintain a single row in y then try this:

Mydata$y <- list(list)

3 row result

If you are looking for a 3-row result try this. The second line can be omitted if it is ok if y has AsIs class.

Mydata2 <- data.frame(Mydata[-2], y = I(list))
class(Mydata2$y) <- NULL

or

Mydata3 <-  replicate(length(list), Mydata)
Mydata3$y <- list

Answer 2

Please check the code below:

#Example list including other lists.
mainList = list(c(4,22,25,66),c(11,'77',2,5))

#convert list to dataframe, transpose and convert back to dataframe again
df= as.data.frame(t(as.data.frame(mainList )))

#You can set NULL to row names if required.
rownames(df)<-NULL

#Show result
df

Online compiler: https://rextester.com/OIIQ72692

Reference: R list of lists to data.frame