: [Bioc-devel] merging DFrames
Laurent,
Thanks for bringing this up and offering to help. Yes, please raise an issue.
There's an opportunity to implement faster matching than base::merge(), using
stuff like matchIntegerQuads(), findMatches(), and grouping().
grouping() can be really fast
Laurent,
Thanks for bringing this up and offering to help. Yes, please raise an
issue. There's an opportunity to implement faster matching than
base::merge(), using stuff like matchIntegerQuads(), findMatches(), and
grouping().
grouping() can be really fast for character vectors, since it takes
Hi Laurent,
I think the current implementation was just an expedient to have
something that works (in most cases). I don't know if a proper
implementation that doesn't go thru data.frame is on the TODO list. Michael?
I suggest you open an issue on GitHub under S4Vectors.
Cheers,
H.
PS: Note
When merging DFrame instances, the *List types are lost:
The following two instances have NumericList columns (y and z)
d1 <- DataFrame(x = letters[1:3], y = List(list(1, 1:2, 1:3)))
d2 <- DataFrame(x = letters[1:3], z = List(list(1:3, 1:2, 1)))
d1
## DataFrame with 3 rows and 2 columns
##
