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)
rb
Hi R Devel,
I wrote some code which depends on 'strptime' being able to parse an
incomplete date, like this:
> base::strptime("2016","%Y")
[1] "2016-01-14 PST"
The above works - although it's odd that it gives the month and day
for Sys.time(). I might expect it to set them both to zero as the GN
Hi Tomas,
Can you share the full code for your benchmark, compiler options, and
performance results so that I can try to reproduce them? There are a lot of
variables that can affect the results. Private email is fine if it is too much
for the mailing list.
I am measuring on Knight's Landing (K
Hi Robert,
thanks for the report and your suggestions how to make the NaN checks
faster.
Based on my experiments it seems that the "break" in the loop actually
can have positive impact on performance even in the common case when we
don't have NaNs. With gcc on linux (corei7), where isnan is
