Displaying 20 results from an estimated 1000 matches similar to: "R optimization and curve()?"
2009 Nov 02
2
a prolem with constrOptim
Hi,
I apologize for the long message but the problem I encountered can't be stated in a few lines.
I am having some problems with the function constrOptim. My goal is to maximize the likelihood of product of K multinomials, each with four catagories under linear constraints on the parameter values. I have found that the function does not work for many data configurations.
#The likelihood
2006 Sep 24
2
HFSC parameter
My problem with HFSC tc command is ...
tc command''s HFSC have a lot parameter with 4 curve type
SC curve -> umax dmax rate
LS curve -> umax dmax rate
RT curve -> umax dmax rate
UL curve -> umax dmax rate
so i''dont know which parameter are appropriate for my test case
such real time class which curve are appropriate and good working result.
my assumption about
2010 May 05
2
[LLVMdev] Why llvm function name is different with . and ..
declare i8 @llvm.atomic.load.max.i8.p0i8( i8* <ptr>, i8 <delta> )
declare i16 @llvm.atomic.load.max.i16.p0i16( i16* <ptr>, i16 <delta> )
declare i32 @llvm.atomic.load.max.i32.p0i32( i32* <ptr>, i32 <delta> )
declare i64 @llvm.atomic.load.max.i64.p0i64( i64* <ptr>, i64 <delta> )
declare i8 @llvm.atomic.load.min.i8.p0i8( i8* <ptr>, i8
2006 Sep 17
1
HTB and HFSC,declaration tc command question
I have a lot question about tc-command because now i''m doing research to compare
performance between HTB and HFSC
so i''m doubt a lot thing and your reply are so very helpful to me ... My question is
In HTB tc command question
1. I''m use opensource (Mastershaper) for help to config traffic control
but when i''m try to config HTB,
I''m doubt about
2019 Feb 09
2
how experimental are the llvm.experimental.vector.reduce.* functions?
The IR update to allow vector types was here:
https://reviews.llvm.org/D57090
...we didn't update the docs at that time because it was not clear what the
backend would do with that, but that might've changed with some of the more
recent patches.
On Sat, Feb 9, 2019 at 1:42 AM Craig Topper via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> I don't think I understand your
2019 Feb 09
2
how experimental are the llvm.experimental.vector.reduce.* functions?
I'm interested in using @llvm.experimental.vector.reduce.smax/umax to
implement runtime overflow checking for vectors. Here's an example
checked addition, without vectors, and then I'll follow the example with
what I would do for checked addition with vectors.
Frontend code (zig):
export fn entry() void {
var a: i32 = 1;
var b: i32 = 2;
var x = a + b;
}
LLVM IR code:
2019 Aug 26
2
missing simplification in ScalarEvolution?
Hi Sanjoy,
Thanks for the reply!
Your approach sounds good to me!
I think 1) is legal as address wraparound in unsigned range doesn't make sense given a positive offset, but I am not sure.
I think umax will not be added if we can prove the predicate as known.
I am not sure whether umax will get simplified if we add nuw to the expressions.
-Pankaj
-----Original Message-----
From: Sanjoy
2001 Oct 16
3
parallel scanner support (general question)
Hi,
I'm using the Umax Astra 610p scanner (parallel port scanner).
Unfortunately, it is not supported by sane as Umax is not publishing specs.
Searching on google I found out that some people got it working using
vmware but nobody could get it working with wine.
That is surprising me because people seem to get lots of complicated
windows applications working but not a small scanner
2019 Feb 09
2
how experimental are the llvm.experimental.vector.reduce.* functions?
On Sat, Feb 9, 2019 at 6:25 PM Simon Pilgrim <llvm-dev at redking.me.uk> wrote:
> The add/sub (+mul) overflow intrinsics are being updated to support
> vectors to match the related add/sub saturation intrinsics. We haven't
> updated the docs yet as legalization, vectorization and various minor bits
> of plumbing still need to be finished before it can be officially supported
2013 Nov 14
1
Possible bug: TC with HFSC fails to load if umax is not provided
I stumbled upon a problem while upgrading Ubuntu 13.04, Shorewall version
from 4.4.26.1 to 4.5.16.1.
Everything was working fine before, after upgrading the script wouldn''t
start.
First some config files.
tcdevices:
#INTERFACE IN-BANDWIDTH OUT-BANDWIDTH OPTIONS REDIRECTED
eth1 - 6300kbit hfsc,classify
ifb0 - 6300kbit hfsc
2006 May 09
3
tc del class not working
When I start my script:
* - Creating classes on br1 for upload control ...
* - tc class add dev br1 parent 2:0 classid 2:46 hfsc ls m1
576.0Kbit d 2000ms m2 192.0Kbit ul m2 384Kbit ...
[ ok ]
* - tc class add dev br1 parent 2:46 classid 2:47 hfsc sc umax
1500b dmax 30ms rate 80Kbit . [ ok ]
* - tc class add dev br1 parent 2:46 classid 2:48 hfsc ls m2
152.0Kbit ul m2 152.0Kbit
2010 Jul 23
1
(no subject)
Dear R list,
I use the constrOptim to maximize a function with four constriants but the answer does not leave from the starting value and there is only one outer iteration. The function is defined as follows:
tm<-function(p){
p1<-p[1]; p2<-p[2]; p3<-p[3];
p4<-1-p1-p2-p3;
p1*p2*p3*p4}
##the constraints are p1>=0; p2>=0; p3>=0 and p4>=0 i.e. p1+p2+p3<=1
2006 Dec 08
1
MAXIMIZATION WITH CONSTRAINTS
Dear R users,
I?m a graduate students and in my master thesis I must
obtain the values of the parameters x_i which maximize this
Multinomial log?likelihood function
log(n!)-sum_{i=1]^4 log(n_i!)+sum_
{i=1}^4 n_i log(x_i)
under the following constraints:
a) sum_i x_i=1,
x_i>=0,
b) x_1<=x_2+x_3+x_4
c)x_2<=x_3+x_4
I have been using the
?ConstrOptim? R-function with the instructions
2005 Sep 26
2
constrOptim (PR#8158)
Full_Name: Haobo Ren
Version: 2.1.1
OS: Windows 2000
Submission from: (NULL) (192.11.226.116)
When running constrOptim, there is error message
Error: subscript out of bounds
2008 Mar 23
2
scaling problems in "optim"
Dear R users,
I am trying to figure out the control parameter in "optim," especially,
"fnscale" and "parscale."
In the R docu.,
------------------------------------------------------
fnscale
An overall scaling to be applied to the value of fn and gr during
optimization. If negative, turns the problem into a maximization problem.
Optimization is performed on
2013 Jun 07
2
[LLVMdev] NEON vector instructions and the fast math IR flags
On 7 June 2013 15:41, Arnold Schwaighofer <aschwaighofer at apple.com> wrote:
> We don’t want to encode backend knowledge into the vectorizer (i.e. don’t
> vectorize type X because the backend does not support it).
>
We already do, via the cost table. This case is no different. It might not
be the best choice, but it is how the cost table is being built over the
last months.
The
2004 Oct 02
1
constraints in optim?
>
optim(c(1,1),LL,method="SANN",control=list(fnscale=-1),trans=trans,times=times)
$par
[1] 17.422635 -1.606859
How could i constraint that the parameters should be both positive in
my maximizing problem?
I check constrOptim but here i could only constraint the variables trans and
times and not my parameters?
many thanks, regards
Christian
2017 May 16
2
[RFC] Canonicalization of unsigned subtraction with saturation
Hi,
This message is a result of a discussion of backend optimization for sub(max) pattern(https://reviews.llvm.org/D25987), which can be either converted to unsigned min-max or unsigned saturation instruction(if the target supports it).
Currently these versions of the code produce different IR(and we need to manage both types in backend):
(1.16)
void foo(unsigned short *p, unsigned short max,
2019 Aug 21
2
missing simplification in ScalarEvolution?
Thanks for the suggestion but datalayout info did not solve the problem!
-Pankaj
-----Original Message-----
From: Philip Reames <listmail at philipreames.com>
Sent: Tuesday, August 20, 2019 5:26 PM
To: Chawla, Pankaj <pankaj.chawla at intel.com>; llvm-dev at lists.llvm.org
Subject: Re: [llvm-dev] missing simplification in ScalarEvolution?
Try adding a datalayout with pointer size
2006 Dec 12
1
About HFSC ?
Hello,
I’ve read this Article avout VOIP and HFSC
http://automatthias.wordpress.com/2006/06/30/hfsc-and-voip/
I’ve got few questions ?
Considering this
tc class add dev $DEV parent 1:1 classid 1:2 hfsc \
rt m1 ${UPLINK}kbit d 50ms m2 $[1*$UPLINK/10]kbit \
ls m1 ${UPLINK}kbit d 50ms m2 $[3*$UPLINK/10]kbit \
ul rate ${UPLINK}kbit
rt = realtime curve
ls = linksharing curve
but
m1 = ?
m2 = ?
d =