similar to: BlackBox testing

I'm trying to get a reference to this object in C SWX.RET[1:6,c("SBI,"SPI","SII")] While i am able to access and use a plain SWX.RET object, I'm getting confused on how to create an object with the array subscripts like above. Here is what I tried to do. It doesn't work because "[" is obviously not an operation or function on SWX.RET. So how do I

Hi I think I have asked these questions earlier, but I been able to find answers from the documentation (which I found poorly written in several places). Will someone be kind enough to give me answers and enlighten me? (as in explain with CODE?) I want to embed R in my application and use the fPortfolio package for carrying out risk management computations. Right now I'm reading the Rmetrics

Hi, I am working on R 2.15.2 on Win. 7. I am trying to run some simple commends. >class(SWX.RET) # SWX.RET is a data file that has been loaded. But, I cannot see the expected output. I have deselected "buffered output". Still it does not work. Any help will be appreciated. Thanks [[alternative HTML version deleted]]

I am experimenting with Matt McCutchen's excellent continusync script, and I'm having an issue. (My copy of continusync has been modified from the original http://mattmccutchen.net/utils/continusync by adding this @ line 227: <$fromInwt>; as suggested by Matt.) The problem is easily reproduced: # mkdir ~/foo # continusync ~/foo root@remotehost:~/foo & # vi

Hi I am unable to try out examples from the Rmetrics Ebook from the R command prompt. Below is an example of what happens: > Covariance<-cov(SWX.RET) Error in cov.timeSeries(SWX.RET) : no slot of name "Data" for this object of class "timeSeries" I have loaded Rmetrics and fPortfolio using the library function but still I get these errors. However, if I embed the R

Hi there! I'm stuck with a problem aligning financial timeseries and haven't found a cue how to fix it... When I run that simple script, everything goes well until the "align"-command: ------ rm(list=ls()) x <- yahooSeries("^GDAXI") head(x) xAligned <- align(x = x, by = "1d", method = "before", include.weekends = FALSE) ------ Here's

Hi I'm trying to implement something similar to the following R snippet using C. I seem to have hit the wall on accessing class slots using C. library(fPortfolio) lppData <- 100 * LPP2005.RET[, 1:6] ewSpec <- portfolioSpec() nAssets <- ncol(lppData) setWeights(ewSpec) <- rep(1/nAssets, times = nAssets) ewPortfolio <- feasiblePortfolio( data = lppData, spec = ewSpec,

Dear list, I just tried to do the same thing, and did not find anything on a weighted qqplot. My weights are actually counts (positive integers). Here is a modification of qqplot, following Duncan Murdoch's suggestion. Any feedback would be welcome! Thanks, Jean-Christophe weighted.qqplot <- function (x, y, plot.it = TRUE, xlab = deparse(substitute(x)), ylab = deparse(substitute(y)),

Hi I'm getting the following errors while using the efficientPortfolio function even though I'm setting the target return to the mean of the TargetReturn I obtain from the portfolio object created by the feasiblePortfolio function. First Error: Error: targetReturn >= min(mu) is not TRUE Second Error: Error in .rquadprog(Dmat = args$Dmat, dvec = args$dvec, Amat = args$Amat, :

Greetings! I have a samba 3.6.18 acts as a domain member. I'm using a samba nss and creating local groups for a domain users. Here part of my nsswitch.conf: group: files winbind passwd: files winbind The problem is that the tdb unix GID mappings returns different ID from time to time for the same SIDs. Suppose we have a local group "samba_svn1", created with "NET SAM

Grasping a full understanding of setting default Users, Groups and Masks has alluded me over the years, but now I find myself in a situation where manually "setting" the file/directory attributes is becoming a pain. I understand the fundamentals of the file attributes, though from time to time I have to review the "sticky bit"; what I do not understand is where/how the

Have anybody managed to get blackbox running on wine ? I have an old installation and no internet on my home computer and just wanted to check if it would run, it really makes windows look nice :-) .. so I figured I'd give it a spin and check if it would be able to round up some wine bugs. However the installation failed, so I can't even run it, this is the reason for asking, is it

On Tue, Nov 3, 2015 at 2:50 PM, Diego Novillo <dnovillo at google.com> wrote: > I don't see how this is any different from volatile markers on > loads/stores or memory barriers or several other optimizer blocking > devices. They generally end up crippling the optimizers without much added > benefit. > Volatile must touch memory (right?). Memory is slow. > Would it

One thing that volatile doesn't do is escape results that have been written to memory. The proposed blackbox intrinsic is modeled as reading and writing any pointed to memory, which is useful. I also think blackbox will be a lot easier for people to use than empty volatile inline asm and volatile loads and stores. That alone seems worth something. :) On Mon, Nov 9, 2015 at 6:04 PM, Daniel

On Mon, Nov 16, 2015 at 6:59 PM, Dmitri Gribenko via llvm-dev < llvm-dev at lists.llvm.org> wrote: > On Mon, Nov 16, 2015 at 10:03 AM, James Molloy via llvm-dev > <llvm-dev at lists.llvm.org> wrote: > > You don't appear to have addressed my suggestion to not require a perfect > > external world, instead to measure the overhead of an imperfect world (by > >

Hi Richard, You don't appear to have addressed my suggestion to not require a perfect external world, instead to measure the overhead of an imperfect world (by using an empty benchmark) and subtracting that from the measured benchmark score. Besides which, absolute benchmark results are more than often totally useless - the really important part of benchmarking is relative differences.

On Fri, 06 Nov 2015 09:27:32 -0800, Daniel Berlin via llvm-dev wrote: <snip> > > Great! > > You should then test that this happens, and additionally write a test > that can't be optimized away, since the above is apparently not a useful > microbenchmark for anything but the compiler ;-) > > Seriously though, there are basically three cases (with a bit of >

I think the idea is to model the intrinsic as a normal external function call: - Can read/write escaped memory - Escapes pointer args - Functionattrs cannot infer anything about it - Returns a pointer which may alias any escaped data It's obvious how this works at the IR level, but I'm not sure what would happen in the backend. If you compile the intrinsic to nothing but a virtual

The common use case I've seen for a black box like construct is when writing microbenchmarks. In particular, you're generally looking for a way to "sink" the result of a computation without having that sink outweigh the cost of the thing you're trying to measure. Common alternate approaches are to use a volatile store (so that it can't be eliminated or sunk out of

On Mon, Nov 2, 2015 at 7:19 PM, Sanjoy Das <sanjoy at playingwithpointers.com> wrote: > Why does this need to be an intrinsic (as opposed to generic "unknown > function" to llvm)? > > Secondly, have you looked into a volatile store / load to an alloca? That > should work with PNaCl and WebAssembly. > > E.g. > > define i32 @blackbox(i32 %arg) { >