Displaying 20 results from an estimated 2000 matches similar to: "R-alpha: cov.mve"
1998 Feb 23
1
R-beta: Help: cov.mve in R? dgamma in Splus?
Hi all
I have a couple of obscure questions for R/Splus experts (which
unfortunately isn't me!)
I am trying to compute Bayes Factors using some Splus code of Raftery
in Gilks et al (1996). Only problem is
1) R doesn't seem to have a robust covariance (cov.mve) which I
suspect I need rather than a non-robust classical estimate
2) Splus has cov.mve BUT dgamma in Splus doesn't have a
2006 Apr 26
1
Minimum Volume Ellipsoid Estimator ("cov.mve"??)
Dear All,
The Minimum Volume Ellipsoid estimator ("cov.mve") was part of S+ but I cannot find it in R. Where can I find it? Why was it excluded?
Cheers, Patrik
Sweden
2006 Sep 25
0
Sampling distribution of correlation estimations derived from robust MCD and MVE methods
Dear R users,
I am trying to use MCD and MVE methods in the analysis of functional imaging
(fMRI) data. But, before doing that, I want to understand the sampling
distribution of the correlation parameter given by MCD and MVE (cov.mcd$cor,
cov.mve$cor).
To this end, I conducted a simulation where in each of 100000 epochs, I
a. construct a matrix from two vectors, each containing 40 numbers
2006 Sep 25
0
[PlainText Attempt] Sampling distribution of correlation estimations derived from robust MCD and MVE methods
Dear R users,
I am trying to use MCD and MVE methods in the analysis of functional imaging
(fMRI) data. But, before doing that, I want to understand the sampling
distribution of the correlation parameter given by MCD and MVE (cov.mcd$cor,
cov.mve$cor).
To this end, I conducted a simulation where in each of 100000 epochs, I
a. construct a matrix from two vectors, each containing 40 numbers
2006 Mar 07
3
[Samba Version 3.0.20b-3.4-SUSE]: WinXP-Error writing to share
Hello mailing-list,
this is my first post and i hope that you enjoy my very bad but
sometimes funny english.
My Problem is the following:
First of all, my server-config:
Samba Version 3.0.20b-3.4-SUSE
on a
SUSE Linux Enterprise Server 9
with Kernel 2.6.5-7.252-smp
Now the problem is, that samba generally works fine, but it doesn't work
to work with a special application directly on a
2020 Nov 06
2
Loop-vectorizer prototype for the EPI Project based on the RISC-V Vector Extension (Scalable vectors)
On 11/6/20 12:39 PM, Sjoerd Meijer wrote:
Hello Simon,
Thanks for your replies, very useful. And yes, thanks for the example and making the target differences clear:
; Some examples:
; RISC-V V & VE(*):
; %mask = (splat i1 1)
; %evl = min(256, %n - %i)
; MVE/SVE :
; %mask = get.active.lane.mask(%i, %n)
; %evl = call @llvm.vscale()
; AVX:
; %mask = icmp (%i + (seq
2020 Nov 06
4
Loop-vectorizer prototype for the EPI Project based on the RISC-V Vector Extension (Scalable vectors)
On 11/6/20 8:49 AM, Roger Ferrer Ibáñez wrote:
Hi Sjoerd,
Trying to remember how everything fits together here, but could get.active.lane.mask not create the %mask of the VP intrinsics? Or in other words, in the vectoriser, who's producing the %mask and %evl that is consumed by the VP intrinsics?
I'm not sure what would be the best way here. I think about the Loop Vectorizer. I imagine
2020 May 18
2
LV: predication
Hi,
I abandoned that approach and followed Eli's suggestion, see somewhere earlier in this thread, and emit an intrinsic that represents/calculates the active mask. I've just uploaded a new revision for D79100 that implements this.
Cheers.
________________________________
From: Simon Moll <Simon.Moll at EMEA.NEC.COM>
Sent: 18 May 2020 13:32
To: Sjoerd Meijer <Sjoerd.Meijer at
2019 Jul 05
5
Python build dependency in LLVM and/or clang?
Hello llvm-devs,
I'm currently starting to look at implementing compiler intrinsics for the Arm MVE vector instruction set.
In a similar sort of style to the existing NEON intrinsics, this is going to involve describing the set of functions needed in Tablegen, and then processing that data into a header file and some bits and pieces to compile into clang (the list of builtins, data tables
2006 Jul 27
6
Any interest in "merge" and "by" implementations specifically for sorted data?
Hi Developers,
I am looking for another new project to help me get more up to speed
on R and to learn something outside of R internals. One recent R
issue I have run into is finding a fast implementations of the
equivalent to the following SAS code:
/* MDPC is an integer sort key made from two integer columns */
MDPC = (MD * 100000) + PCO;
/* sort the dataset by the key */
PROC SORT;
2020 Nov 05
2
Loop-vectorizer prototype for the EPI Project based on the RISC-V Vector Extension (Scalable vectors)
For RISC-V V and VE being explicit about %evl is important for performance & correctness and that is what VP does. The get.active.lane.mask intrinsic is used as a hint for the MVE, SVE backends to use hardware tail-predication (the backends reverse engineer that hint by pattern matching for get.active.lane.mask in the mask parameter of "some" masked intrinsics). IMHO, it's more
2020 May 18
2
LV: predication
> You have similar problems with https://reviews.llvm.org/D79100
The new revision D79100<https://reviews.llvm.org/D79100> solves your comment 1), and I don't think your comments2) and 3) apply as there are no vendor specific intrinsics involved at all here. Just to quickly discuss the optimisation pipeline, D79100<https://reviews.llvm.org/D79100> is a small extension for the
2020 May 04
3
LV: predication
Hi Roger,
That's a good example, that shows most of the moving parts involved here. In a nutshell, the difference is, and what we would like to make explicit, is the vector trip versus the scalar loop trip count. In your IR example, the loads/stores are predicated on a mask that is calculated from a splat induction variable, which is compared with the vector trip count. Illustrated with your
2020 May 01
3
LV: predication
Hello,
We are working on predication for our vector extension (MVE). Since quite a few people are working on predication and different forms of it (e.g. SVE, RISC-V, NEC), I thought I would share what we would like to add to the loop vectoriser. Hopefully it's just a minor one and not intrusive, but could be interesting and useful for others, and feedback on this is welcome of course.
TL;DR:
1998 Apr 17
2
R-beta: lmsreg
Does R have a function like the S(plus) function, lmsreg, Least Median
of Squares Regression? I am using R-0.61.
Thank you,
Mike Fleming
mfleming at nass.usda.gov
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r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or
1998 Apr 17
2
R-beta: lmsreg
Does R have a function like the S(plus) function, lmsreg, Least Median
of Squares Regression? I am using R-0.61.
Thank you,
Mike Fleming
mfleming at nass.usda.gov
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or
2011 Dec 06
2
Why can't I figure this out? :S
Hi, so I don't speak computer and I have no idea what this code is telling
the program to do, but I apparently need to be able to find and isolate
influencial observations. Problem, I have no idea what the error means and
where it may be from in the code.
error I get is below the code
{
## OLS results
NameC<- lm(gpanew~female+female:lastinit+agenew+canadian+mom_ed+yearstudy)
## default:
2000 Jan 31
1
Feature requests for princomp(.) : Allow cor() specifications
(all in subject).
If I want to do a PC analysis in a situation with missing data,
I may want to have same flexibility as with "cor(.)",
e.g., I may want
princomp(x, ..., use.obs = "pairwise.complete")
Actually, I may want even more flexibility.
Currently,
princomp(.)
has
if (cor)
cv <- get("cor", envir = .GlobalEnv)(z)
else cv <-
2019 May 20
3
[RFC] Intrinsics for Hardware Loops
Hi,
Arm have recently announced the v8.1-M architecture specification for
our next generation microcontrollers. The architecture includes
vector extensions (MVE) and support for low-overhead branches (LoB),
which can be thought of a style of hardware loop. Hardware loops
aren't new to LLVM, other backends (at least Hexagon and PPC that I
know of) also include support. These implementations
2004 Feb 11
1
MCD-Estimator in R
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