search for: splitting

There are a number of functions that are dispatched to from split(). > methods('split') [1] split.data.frame split.Date split.default split.POSIXct Is there a way to figure out which of these variants is actually dispatched to when I call split? I know that if the argument is of the type data.frame, split.data.frame will be called? Is it the case that if the argument is not

Hello, I'm trying to do two things: -1. Ensure that I understand how quantmod adjust's OHLC data -2. Determine how I ought to adjust my data. My overarching-goal is to adjust my OHLC data appropriately to minimize the difference between my backtest returns, and the returns I would get if I was trading for real (which I'll be doing shortly). Background: -1. I'm using Alpha

Hi all, In the help of strsplit one can read split character vector (or object which can be coerced to such) containing regular expression<http://127.0.0.1:39783/help/library/base/help/regular%20expression>(s) (unless fixed = TRUE) to use for splitting. If empty matches occur, in particular if split has length 0, x is split into single characters. Ifsplit has length greater than 1, it is re-cycled along x. Taking into account that split is said to be a vector (not a length 1 vector) and the last claim above, I would expect that the output of s...

Hello, I’d like to give a status update to the community about the recently-added hot/cold splitting pass. I'll provide some motivation for the pass, describe its implementation, summarize recent/ongoing work, and share early results. # Motivation We (at Apple) have found that memory pressure from resident pages of code is significant on embedded devices. In particular, this pressure spikes...

The splitting pass currently doesn’t move cold symbols into a separate section. Is that affecting your results? On Darwin, we plan on using a symbol attribute to provide an ordering hint to the linker (see r352227, N_COLD_FUNC). vedant > On Jan 28, 2019, at 10:51 AM, Aditya K via llvm-dev <llvm-dev at l...

...that it might be best to at first disallow it until proven doable > by someone working in an isolated branch -- although proving it works may be difficult, > since so little code actually uses exceptions (only TableGen in llvm ?). Peter, I think this will be done lazily to avoid excessive splitting as in: Call1 -> LP Call2 -> LP Call3 -> LP => split Call1 Call1 -> LP-split -> LP-remainder Call2 -> LP-split-merge -> LP-remainder Call3 -> LP-split-merge -> LP-remainder But John will know best. -Andy -------------- next part -------------- An HTML attachment wa...

On Mon, Jan 28, 2019 at 11:03 AM Aditya K via llvm-dev < llvm-dev at lists.llvm.org> wrote: > > The splitting pass currently doesn’t move cold symbols into a separate > section. Is that affecting your results? > Maybe partly, the main reason is that, in the absence of good profile > info, we aren't finding many cold blocks. > We noticed that the split cold functions are ending up in the re...

...le.com> wrote: > Hi Teresa, > > On Feb 5, 2019, at 2:38 PM, Teresa Johnson via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > > > > > On Mon, Jan 28, 2019 at 11:03 AM Aditya K via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > >> > The splitting pass currently doesn’t move cold symbols into a separate >> section. Is that affecting your results? >> Maybe partly, the main reason is that, in the absence of good profile >> info, we aren't finding many cold blocks. >> > > We noticed that the split cold function...

Dear R-users, The following code splits a very simple dataframe into a list, each element of the list being one line of the dataframe. You will see that the split function names each element of the list by using uses the content of a and b and merging them with a "." character. Is there a way to customize this character? a<-1:10 b<-21:30 mydata<-data.frame(a,b)

Hello All, I have a toy dataframe like this. It has 8 columns separated by tab. Name SampleID Al1 Al2 X Y R Th rs191191 A1 A B 0.999 0.09 0.78 0.090 abc928291 A1 B J 0.3838 0.3839 0.028 0.888 abcnab A1 H K 0.3939 0.939 0.3939 0.77 rx82922 B1 J K 0.3838 0.393

Dear R-users I seem to be stumped on something simple. I want to split a data frame by factor levels given in one or more columns e.g. given dat <- data.frame(x = runif(100), fac1 = rep(c("a", "b", "c", "d"), each = 25), fac2 = rep(c("A", "B"), 50)) I know I can split it by fac1, fac2 by:

I am very sorry for such a simple question, but I am struggling with "split". I have the following data frame: x<-data.frame(A=c(NA,NA,NA,NA,"split",NA,NA,NA,NA,"split",NA,NA,NA,NA,"split",NA,NA,NA,NA),

...ignificantly differ from each other. If this is a yes (p < alpha) I want to split again (into 4 groups) and do the same procedure twice, and stop otherwise (here the problem arises). As a final result I would have different groups of data. I made some code where the data is splitted, until no splitting is possible. So for 16 datapoints, we can split 4 times with a final result of 16 groups (p is NA for the 4th split since sd cannot be calculated..). The code calculated all p values, but I don't want this. I want it to stop when p > alpha. I tried while, but didn't succeed. I hope...

Hello, I very much enjoy "with" and "subset" semantics for data frames and was wondering if we could have something similar with split, basically by evaluating the second argument "with" the data frame : split.data.frame function(x, f, drop = FALSE, ...){ call <- match.call( ) fcall <- call( "with", data = call[["x"]],

I didn't see anything on this in the bug reports, and a search of the archives had lots of false positives when searching on "split" to be helpful. I don't view this as particularly interesting or useful, but wanted to report it because I stumbled on it (and don't remember ever seeing "invalid permissions" as part of a segfault).? Yes, I realize this is a silly

...apple.com] Sent: 09 March 2015 23:08 To: Lang Hames Cc: Jonas Paulsson; llvmdev at cs.uiuc.edu; Arnaud De Grandmaison Subject: Re: PBQP spilling Hi Lang, Thanks for the clarifications. On Mar 9, 2015, at 2:30 PM, Lang Hames <lhames at gmail.com> wrote: Hi Quentin, Jonas, Splitting fits in with PBQP reasonably well, at least conceptually. The PBQP graph is designed to be mutable, so there is no problem with updating it when splitting. As I see it, there are two logical places to integrate splitting into PBQP: 1) Split during spilling -- If a PBQP solution selects the...

Copies somewhat from the file plugin, with the difference that we always provide an .extents even if one or more of the split files does not support SEEK_HOLE. Testing is possible on a file system that supports sparse files when using nbdsh. Signed-off-by: Eric Blake <eblake@redhat.com> --- I'm going ahead and committing this, but am also posting this for review in case we later find

Hi, I am wondering why the other brick is not showing any entry in split brain in the heal info split-brain output. Can you give the output of stat & getfattr -d -m . -e hex <file-path-on-brick> from both the bricks. Regards, Karthik On Mon, Feb 5, 2018 at 5:03 PM, Alex K <rightkicktech at gmail.com> wrote: > After stoping/starting the volume I have: > > gluster volume

Hi, When I look at the summary of an rpart object run on my data, I get 7 nodes but when I plot the rpart object, I get only 3 nodes. Should the number of nodes not match in the results of the 2 functions (summary and plot) or it is not always the same? Look forward to your reply, Carol -------------------------------------------- ?summary(rpart.res) Call: rpart(formula = mydata$class ~ ., data

I'm having trouble using split on a very large data-set with ~1400 levels of the factor to be split. Unfortunately, I can't reproduce it with the simple self-contained example below. As you can see, splitting the artificial dataframe of size ~13MB results in a split dataframe of ~ 144MB, with an increase memory allocation of ~10 fold for the split object. If split scales linearly, then my actual 52MB dataframe should be easily handled by my 12GB of RAM, but it is not. instead, when I try to split select...