[R] a list with row.names = c(NA, 1000)

[Taka Matzmoto]

R users,

I posted a message on "error message for row names". I looked at a saved 
file that has a list structure.
I found that some of list components have row.names = c(NA, 1000). I 
compared what I did with R.2.3.0 with what I did with R.2.4.0.

Previously, with R.2.3.0, row.names = c("1", "2", "3", ...., "1000"). What 
do I need to read the list with row.names attributes have NA ?

TK,

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