search for: costantement

I have a piece of code as the one at the bottom, unfortunately since it involves time series from a db it's not easy to give to mailing list a working script. It becomes very slow after few hundred iterations over variable sp (must process several thousands). The Rprof() indicates that the problem is the use of gc(). Can someone indicate what I have to take care of not to call gc() so often?

Dear R users, suppose we have a random walk such as: v_t+1 = v_t + e_t+1 where e_t is a normal IID noise pocess with mean = m and standard deviation = sd and v_t is the fundamental value of a stock. Now suppose I want a trading strategy to be: x_t+1 = c(v_t – p_t) where c is a costant. I know, from the paper where this equations come from (Farmer and Joshi, The price dynamics of common

Dear all, I define , for n=5 or any integer greater than 0. A<-array((1/2)^n , c(rep(2,n))) then for any i not equal to j, and 1<=i,j<=n, B<-apply(a,c(i,j),sum) now B is a 2 by 2 matrix, I also define another costant 2 by 2 matrix G, How can I change the values of each elements of array A, according the rule that, for example, i=3,j=5,

2005/7/26, Chris Lattner <sabre at nondot.org>: > Tzu-Chien Chiu wrote: > > The same problem exists when there are two types of costant registers, > > floating point and integer, and each is declared 'packed' ([4xfloat] > > and [4xint]). The instruction selector doesn't know which instruction > > it should produce because the newly defined MVT type

Thanks, I think it can solve my problem. But please allow me to explain the hardware in detail. Hope there is more elegant way to solve it. The hardware is a "stream processor". That is, It processes samples one by one. Each sample is associated with several 128-bit four-element vector registers, namely: * input registers - the attributes of the sample, the values of the registers

On Mon, 25 Jul 2005, Tzu-Chien Chiu wrote: > But please allow me to explain the hardware in detail. Hope there is > more elegant way to solve it. Sounds good! > The hardware is a "stream processor". That is, It processes samples > one by one. Each sample is associated with several 128-bit > four-element vector registers, namely: > > * input registers - the

Hi. I'm sending this email to -dev as this may be of interest of many/people may have opinions/want to try the change before it goes in to report problems. I've been recently working on a patch to integrate `undef` in the SCCP solver, in the hope of fixing a tail of latent bugs in SCCP which remained uncovered for many years. I think this is a decent time to propose, so that it can

Hi all, I'm trying to use the libvirt event system in order to notify the VM status (VM boot, reboot, crash, etc.). I must use the java binding, so I exposed some calls not present in "Libvirt-java" jna interface: virEventRunDefaultImpl() virEventRegisterDefaultImpl() (and several costant). In my java source I tried to intercept the event, using the

BSDday Argentina 2010 - http://www.bsdday.org/ Buenos Aires City * OpenBSDeros - OpenBSD User Group and * BUG-DC-UBA-AR BSD User Group of Computer Department of the Faculty of Natural Sciences, University of Buenos Aires, call to the community of free software, users, system administrators and developers of BSD systems for participation to BSDday 2010. The subject of the event is BSD

On Fri, Dec 30, 2016 at 9:27 AM, Davide Italiano via llvm-dev < llvm-dev at lists.llvm.org> wrote: > Hi. > I'm sending this email to -dev as this may be of interest of > many/people may have opinions/want to try the change before it goes in > to report problems. > I've been recently working on a patch to integrate `undef` in the SCCP > solver, in the hope of fixing

Hi David, Looking at the original bug, it seems like a straightforward undef-propagation bug to me -- SCCP was folding "or undef, constant" to "undef", which is wrong. Why is changing that not the fix? That is, some variant of diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp index 8a6be97..45f1241 100644 --- a/lib/Transforms/Scalar/SCCP.cpp +++

Hello, I just installed the above openssh onto a Sun Solaris 7 and Solaris 8 system. No problem with that. However, I now seem to get some rubbish processed when I login with slogin. An example: Last login: Tue Jun 13 12:31:27 2000 from jhorne.csd.plymo:tJ` ^[[?1;2c Telnet logs in okay, but just shows 'Last login...jhorne.csd.plymo'. This seems to get passed to the shell, which it of

-----Messaggio originale----- Da: Ambrosini Alessandro [mailto:klavan at tiscalinet.it] Inviato: luned? 29 aprile 2002 20.38 A: R-help at lists.R-project.org Oggetto: Problem Hello! This is the situation. I have a file in wich there is a scattered matrix. I give an example: aa bb cc bb xx dd cv st rw xx yu de qw ww zzp where aa is a node that has a path with aa, one with bb, and one with cc.

On Sat, 23 Jul 2005, Tzu-Chien Chiu wrote: > 2005/7/23, Chris Lattner <sabre at nondot.org>: >> What does a 'read only' register mean? Is it a constant (e.g. returns >> 1.0)? Otherwise, how can it be a useful value? > > Yes, it's a constant register. > > Because the instruction cannot contain an immediate value, a constant > value may be stored in

On Fri, Dec 30, 2016, 9:04 PM Sanjoy Das via llvm-dev < llvm-dev at lists.llvm.org> wrote: > Hi David, > > Looking at the original bug, it seems like a straightforward > undef-propagation bug to me -- SCCP was folding "or undef, constant" > to "undef", which is wrong. Why is changing that not the fix? That > is, some variant of > You would still

2005/7/23, Chris Lattner <sabre at nondot.org>: > > What does a 'read only' register mean? Is it a constant (e.g. returns > 1.0)? Otherwise, how can it be a useful value? Yes, it's a constant register. Because the instruction cannot contain an immediate value, a constant value may be stored in a constant register, and it's defined _before_ the program starts by

Hi, On Fri, Dec 30, 2016 at 9:23 PM, Daniel Berlin <dberlin at dberlin.org> wrote: > > > On Fri, Dec 30, 2016, 9:04 PM Sanjoy Das via llvm-dev > <llvm-dev at lists.llvm.org> wrote: >> >> Hi David, >> >> Looking at the original bug, it seems like a straightforward >> undef-propagation bug to me -- SCCP was folding "or undef, constant"

Hello! If I have a matrix as 1 2 2 3 and I want to change the value 2 in 0, what can I do? Thank you -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !)