将每个单元格中带有 data.frames 的列表列添加到 data.frame

Question

I am trying to add a list-column containing data.frames in each position/cell of the list to a main data.frame

meta <- data.frame(n=1:2,
           d = list(iris,mtcars))

but this yields an error message:

Error in (function (..., row.names = NULL, check.rows = FALSE, check.names = TRUE,  : 
  arguments imply differing number of rows: 150, 32

MY desired output is the meta data.frame with 2 rows and two columns.

Answer 1

The data.frame function doesn't handle list arguments the way you want, but you can add a list column after the fact

meta <- data.frame(n = 1:2)
meta$d <- list(iris, mtcars)