Displaying 20 results from an estimated 52 matches for "characterise".
2008 Dec 12
1
mixed model nested ANOVA
Hi,
I'm working on leaf characteristics of trees. Each tree is characterised by
about 10 leaf traits.
The trees were sampled at 9 different locations (about 20 to 30
trees/location, NOT balanced), grouped in 3 different climatic zones
(Sahelian, Soudanian and Guinean) (NOT balanced).
Further, each tree is characterised by some degree of human pressure
(mutilation degree),...
2015 Jul 01
4
[LLVMdev] C as used/implemented in practice: analysis of responses
On 1 July 2015 at 11:34, Russell Wallace <russell.wallace at gmail.com> wrote:
> Why do you say spin?
You're dismissing all use-cases other than this very narrow one I'd
(with my own spin) characterise as "Do What I Mean, I Can't Be
Bothered To Get My Code Right". Fair enough, you're arguing in favour
of a point; but it's not one I agree with.
Tim.
2014 May 15
2
[LLVMdev] 3.4 branch gcc 4.9 build error
...econdary symptom of the wider problem reported by
>> distributions.
>>
> So does this mean there is an additional fix that is required for the 3.4 branch?
Nope, the two proposed patches should resolve the underlying issue just
fine as well as the self-host problem.
Just writing to characterise the problem, which is slightly different to
the OP's description.
Alp.
--
http://www.nuanti.com
the browser experts
1997 Nov 02
0
R-beta: A vector of lists == Data Frame?
I hope a very basic R/S programming question is appropriate for this
list...
I have a function which returns a list of several (named) numeric
values characterising an event history for a person. I want to invoke
the function many (1000) times and create a vector of these lists to
represent the histories of a population.
At first, I thought that a data frame would be the appropriate way to
2010 Mar 02
3
[LLVMdev] Embedding LLVM
Is there a guide anywhere to embedding LLVM into a program to compile
and run a DSEL?
Thanks,
Sean
2003 Nov 24
2
1.8.1 and subsetting dataframes
...using earlier versions of
R (Linux).
A dataframe is created and new columns added to it by doing
calculations using apply with various functions on some of the
original columns. It's somewhat too involved to give a toy example
that's reproducible. However, the resulting phenemonon can be
characterised by the following:
Browse[1]> dim(mod.df)
[1] 409 5
Browse[1]> object.size(mod.df)
[1] 31520
Browse[1]> is.array(mod.df)
[1] FALSE
Browse[1]> mod.df[1:5,]
Error in as.data.frame.default(x[[i]], optional = TRUE) :
can't coerce array into a data.frame
The whole dataframe would d...
2010 May 14
1
nonlinearity and interaction
...ion:
Suppose that the system is nonlinear such that the response to the
sequence 0,2 is not the same as the response to 2, 0 -- it is not just
a change of the response by the same amount. Or nonlinear in other
weird ways (I don't just mean simple things like y~x^2).
I am thinking that a way to characterise this might be to pretend that
x is not a continuous variable and to represent it with 5 indicator
variables. And then interactions between them would tell me about
nonlinear effects?
e.g.
lm(y~ d1 + d2 + d3 + d4 + d5 + d1*d2) etc
Does this make any sense? If so, please suggest a good way to go abou...
2006 Oct 09
1
regarding bootstrapping
Hi All,
Thanks for all your discussions which I read offline and enhance my
knowledge.
I just want to know how to make yield curve by bootstrapping using R.
Please give me some subject-matter links and code links.
Especially the Spot Yield Curve and YTM Curve.
Sayonara With Smile & With Warm Regards :-)
G a u r a v Y a d a v
Senior Executive Officer,
Economic Research &
2024 Sep 06
1
BUG: atan(1i) / 5 = NaN+Infi ?
...(C89) but was in C99.
The complex numbers do indeed form a field, and Z*W invokes an
operation in that field when Z and W are both complex numbers. Z*R
and R*Z, where R is real-but-not-complex, is not that field operation;
it's the scalar multiplication from the vector spec view.
One way to characterise the C and Ada view is that real numbers x can
be viewed as (x,ZERO!!!) and imaginary numbers y*i can be viewed as
(ZERO!!!, y) where ZERO!!! is a real serious HARD zero, not an IEEE
+epsilon or -epsilon, In fact this is important for getting "sign of
zero" right.
x + (u,v) = (x+u, v) *NO...
2024 Sep 06
1
BUG: atan(1i) / 5 = NaN+Infi ?
...ithmetic wrong).
I see your point.
> As for complex division, getting that *right* in floating-point is
> fiendishly difficult (there are
> lots of algorithms out there and the majority of them have serious flaws)
> and woefully costly.
> It's not unfair to characterise implementing complex/real
> by conversion to complex and doing complex/complex as a
> beginner's bungle.
ouch! ... but still I tend to acknowledge your point, incl the "not unfair" ..
> There are good reasons why "double", "_Imaginary double"...
2009 Jul 14
11
Lenny DomU Crash!
Hi all,
i have a CentoOS based Xen Dom0 running gitco xen3.3.1. I''m experiencing
problems with debian Lenny FV domU. After some days of perfect working the
VM start to consume all cpu and than i can only connect via ssh to VM and
nothing work, neither the "top" command!
Any idea?
Thanks a lot and regards,
Francesco
2001 Jul 30
1
ext3-2.4-0.9.5
...eb site. The intent here is that the external journal be an NVRAM device
(or a disk) which can be used to accelerate full-data journalling.
Simulation using a normal RAM drive indicates that we can double throughput
with some loads (dbench) but not others (synctest). More work is needed to
fully characterise this.
For the synchronous operations I've put together an application which
attempts to simulate an MTA's behaviour. The simulator is called
`synctest' and it is in ext3 CVS. There's a copy at
http://www.uow.edu.au/~andrewm/synctest.c - I'd really appreciate it if the MTA
gu...
2015 Jul 02
5
[LLVMdev] C as used/implemented in practice: analysis of responses
...;mailto:t.p.northover at gmail.com>> wrote:
On 1 July 2015 at 11:34, Russell Wallace <russell.wallace at gmail.com<mailto:russell.wallace at gmail.com>> wrote:
> Why do you say spin?
You're dismissing all use-cases other than this very narrow one I'd
(with my own spin) characterise as "Do What I Mean, I Can't Be
Bothered To Get My Code Right". Fair enough, you're arguing in favour
of a point; but it's not one I agree with.
Tim.
---------------------------------------------------------------------
Intel Israel (74) Limited
This e-mail and any attachmen...
2024 Sep 06
1
BUG: atan(1i) / 5 = NaN+Infi ?
...plex is inefficient (as well as getting the finer points of IEEE
arithmetic wrong).
As for comple division, getting that *right* in floating-point is
fiendishly difficult (there are
lots of algorithms out there and the majority of them have serious
flaws) and woefully costly.
It's not unfair to characterise implementing complex/real by
conversion to complex and
doing complex/complex as a beginner's bungle.
There are good reasons why "double", "_Imaginary double", and "_Complex double"
are distinct types in standard C (as they are in Ada), and the
definition of multip...
2017 Nov 14
0
IMAP connections with ".eml" in the username - bot attack.
...t?
Mitigate what? Even by your account, this won't get them anywhere, unless it's
so fast and heavy, it's DoS'ing your system. Other than that, they're just bloating
your logs, nothing more.
If you want to pre-empt this via firewall, you'll need to get extremely lucky to
characterise these IPs (a sample of 2 is not enough) in such a way as to able to
formulate a firewall rule. Mostly likely, this is a rented botnet. If you somehow
figure out an oracular rule to discern bot from some user road-warrior *before*
they connect, give me a call.
Sean Greenslade <sean at seangree...
2009 Oct 08
0
Suggestions for low level RTP stream generator?
Hi,
I need to build a simple, command-line method to generate a legal and
"perfect" RTP stream across a network link, and analyse it on the other side
and measure network performance. Want to do this for a number of links and
over long periods. I'm trying to characterise performance of various
available Internet links locally as input into a design project.
Asterisk isn't ideal for me because I just want a one-way stream and in the
case of things like Echo, Milliwatt, MusicOnHold etc the generated RTP
stream is "synchronised" to the incoming RTP and...
2010 May 10
1
Number and colon precedes some package names in yum.log
What is the meaning of the "4:", "2:", "30:" and "1:" prefixes for the
following entries in yum.log? Most entries in yum.log don't have
them.
grep "Installed: [0-9]*:" /var/log/yum.log
May 07 16:45:53 Installed: 4:perl-5.8.8-27.el5.i386
May 07 16:58:21 Installed: 2:xinetd-2.3.14-10.el5.i386
May 07 17:03:43 Installed:
2005 Jun 30
3
Delay
Hello.
I'm programing a tool for ip telephony in hifi quality (diploma) ...
I want to know what coding delay ogg produces.
Are there low delay variantes?
Can anyone help me?
Thanks
2013 Jan 04
0
ncRNAs and chromatin
Jenner lab, University College London
Our laboratory uses genomics and biochemical techniques to identify how
transcription factors, chromatin modifiers and non-coding RNAs act to
regulate cell differentiation. Our research has led to the
characterisation of a class of short RNAs transcribed from polycomb
target genes that interact with polycomb repressive complex-2 (Kanhere
et al., Mol Cell
2010 May 07
0
Cluster procedure using geographical neighborhood
...owledge in
DS> Statistics, but not in numerical computation.
DS> I found your email at the Cran website.
DS> At now I am working on segmentation of a GIS database. My problem is
DS> that I have a set of points over a region and I need to define sub
DS> region characterised by small inside variability.
DS> The application seems to apply a hierarchical cluster analysis, but the
DS> agglomeration procedure should consider only pairs of clusters or of
DS> points that are neighbours.
DS> This can be performed deleting the dissimilarities in...