I suspect there may be a bug in base::rbind.data.frame
Below there is minimal example of the problem:
m <- matrix (1:12, 3)
dfm <- data.frame (c = 1 : 3, m = I (m))
str (dfm)
m.names <- m
rownames (m.names) <- letters [1:3]
dfm.names <- data.frame (c = 1 : 3, m = I (m.names))
str (dfm.names)
rbind (m, m.names)
rbind (m.names, m)
rbind (dfm, dfm.names)
#not working
rbind (dfm.names, dfm)
Error in rbind(deparse.level, ...) : replacement has length zero
rbind (dfm, dfm.names)$m
[,1] [,2] [,3] [,4]
<NA> 1 4 7 10
<NA> 2 5 8 11
<NA> 3 6 9 12
a 1 4 7 10
b 2 5 8 11
c 3 6 9 12
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