Displaying 20 results from an estimated 24 matches for "unmeasur".
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2003 Oct 07
2
Samba 3.0 is WORKING
...ist gets mostly
bugs and questions..
Due mainly to the help that this list provided, I am now able to
successfully deploy Linux/Samba servers in our corporate domain, and allow
remote offices to function as part of our vast windows domain. Things are
working, and the $$$ it has saved us is almost unmeasurable.
Again, thanks for your help, and keep up the good work!! It took me a
while to admit it, but heck, samba is pretty cool.. ;)
Gabriel Matthews
Network Support
Cinergy Communications
"No. I am your father."
-Darth Vader, leader, devoted parent,
and friend to all.
2008 Feb 23
0
Announcement: obsSens Package
The new package obsSens is now on the CRAN mirrors. This package has tools for doing senstitivity analysis for observational studies.
The common criticism of observational studies is that there is the possibility of an unmeasured variable that is related to both the response and the predictor of interst that could explain the observed relationship. The sensitivity analysis is a "What If?" game where you specify potential relationships between the unmeasured variable and the response and predictor variable and s...
2008 Feb 23
0
Announcement: obsSens Package
The new package obsSens is now on the CRAN mirrors. This package has tools for doing senstitivity analysis for observational studies.
The common criticism of observational studies is that there is the possibility of an unmeasured variable that is related to both the response and the predictor of interst that could explain the observed relationship. The sensitivity analysis is a "What If?" game where you specify potential relationships between the unmeasured variable and the response and predictor variable and s...
2006 Nov 01
2
echo with spa-3000
...e is a gross impedance
mismatch on my side of the telco switch. I believe the following is
happening (latency measures are guesses):
Handset -(0ms)- PAP2 -(40ms)- Asterisk -(40ms)- SPA3000 -(0ms)- Telco
Does an EC algorithm need a measurable delay to work? The EC would have
to cope with an almost unmeasurably small echo delay (the delay only
creeps in on the other side of the IP link. Is there another way I
should be solving this problem, especially as I can keep Asterisk in the
loop if I want to?
Thanks
James
2006 Aug 15
1
A model for possibly periodic data with varying amplitude [repost, much edited]
...of the protein looks periodic,
but the height of the peaks is highly variable. I'm testing for
periodicity using a Monte Carlo simulation envelope approach applied
to a cumulative periodogram. Now I want to predict the location of
the peaks in time. Of course, the peaks might be occurring on
unmeasured days.
Sadly, an NDA prohibits me from sharing the real data. The data look
something like this:
##################################################################
patient <- data.frame(
day = c(1, 3, 5, 8, 10, 12, 15, 17, 19, 22, 24, 26),
protein = c(5, 3, 10, 7, 2, 8, 25, 22, 7, 10, 12,...
2024 Jan 22
2
Use of geometric mean .. in good data analysis
...s of
LLOD's and known values separately. There are undoubtedly more
sophisticated methods out there, so this is where you need to go to the
literature to see what might suit; though I think it will still have to
come down to looking at these separately (e.g. with extra parameters to
account for unmeasurable values). Another way of saying this is: any
analysis which treats all the data as arising from a single distribution
will depend more on the assumptions you make than on the data. So good luck
with that!
b) If you have a "modest" amount of (known) censoring -- 5%?, 20%? 10%? --
metho...
2004 Nov 24
1
OOT: frailty-multinivel
Hola!
I started to search for information about multilevel survival models, and
found frailty in R. This seems to be something of the same, is it the same?
Then: why the name frailty (weekness?)
--
Kjetil Halvorsen.
Peace is the most effective weapon of mass construction.
-- Mahdi Elmandjra
2024 Jan 22
1
Use of geometric mean .. in good data analysis
...and known values separately. There are undoubtedly more
>sophisticated methods out there, so this is where you need to go to the
>literature to see what might suit; though I think it will still have to
>come down to looking at these separately (e.g. with extra parameters to
>account for unmeasurable values). Another way of saying this is: any
>analysis which treats all the data as arising from a single distribution
>will depend more on the assumptions you make than on the data. So good luck
>with that!
>
>b) If you have a "modest" amount of (known) censoring -- 5%?...
2006 Jul 31
0
Three questions about a model for possibly periodic data with varying amplitude
...protein = c(5, 3, 10, 7, 2, 8, 25, 12, 7, 20, 10, 5)
)
plot(patient$day, patient$protein, type="b")
My goal is two-fold: firstly, I need to test for periodicity, and
secondly, I need to try to predict the temporal location of future
peaks. Of course, the peaks might be occurring on unmeasured days.
I have been looking at this model:
wave.form <-
deriv3( ~ sin(2*pi*((day-offset)/period + 0.25)) * amplitude + mean,
c("period", "offset", "amplitude", "mean"),
function(day, period, offset, amplitude, mean){})
curve(wave.fo...
2005 Nov 05
3
Keeping the queries down...
I''m trying to ensure that I keep the number of queries down a bit. If I
have two model (lets call them Foo and Bar). They have a many to many
relationship. Now I want to get (and paginate) records from Bar that are
related to a certain record in Foo. For example I want all records from
Bar whose name starts with ''C'' and are related to record Foo whose name
is
2008 Apr 09
0
Endogenous variables in ordinal logistic (or probit) regression
...respondent likes the Republican Party in
America.
By the usual simultaneous equation argument, one should not simply run 2 polr
polr (Y1 ~ Y2 + X1 +X2)
and
polr(Y2 ~ Y1 + X1 + X2)
because Y1 and Y2 are endogenous. Where does the problem arise?
Thinking back to the theoretical model, there are unmeasured scale
variables y1* and y2* that are determined by
y1* = b0 + b1 * y2 + b2 * X1 + b3 * X2 + e1
and
y2* = c0 + c1 * y1 + c2 * X1 + c3 * X2 + e2
y1* and y2* are not observed, we see only the categorical outputs Y1
and Y2 that correspond to
Y1 = 0 if y1* < pi1
Y1 = 1 if pi1 <=...
2004 Aug 06
1
k.j.wierenga@home.nl: " why is there a timeout in _accept_connection (icecast/src/connection.c)"
Sorry for replying in this way, I can send to the list ok, but I can't seem
to subscribe to the list. majordomo doesn't accept my email address as a
valid address (k.j.wierenga@home.nl
> This is primarily to allow clean shutdown to proceed normally. The CPU
load is
> nominal - I doubt you'd be able to measure it. However, if you want to
change
> this timeout, it's safe
2015 Feb 19
1
Recycling memory with a small free list
...> doesn't, normal allocation takes place.
>
> The "free list" is stored as two small fixed size arrays containing
> size/address pairs. Searching is done linearly using code that
> optimizes to SIMD comparisons. For 4/8/16 slots overhead of the
> search should be unmeasurably fast.
>
> The key to the approach would be keeping it simple, and realizing that
> the goal is only to get the lowest hanging fruit: repeated
> assignments of large arrays used in a loop. If it's complex, skip it
> --- the behavior will be no worse than current.
>
> B...
2012 Apr 26
3
[help]: VPID tagged TLBs question.
Hi,
(Assume VPID is available and enabled.)
I''m trying to figure the TLB stuff with VPIDs. I understand from the
poorly written chapter in the intel manual that if an HVM vcpu is running
then only the TLBs tagged with the vcpu.VPID will be used. If xen
or a PV guest is running, then VPID 0 TLBs are what will be used.
Now I understand the hvm_asid_flush_vcpu upon new guest cr3, will
2015 Feb 18
3
Recycling memory with a small free list
> ... with assignments inside of loops like this:
>
> reweight = function(iter, w, Q) {
> for (i in 1:iter) {
> wT = w * Q
> }
> }
> ... before the RHS is executed, the LHS allocation would be added
> to a small fixed length list of available space which is checked
> before future allocations. If the same size is requested before the
> next garbage
2015 Feb 19
0
Recycling memory with a small free list
...uits and recycles it. If it
doesn't, normal allocation takes place.
The "free list" is stored as two small fixed size arrays containing
size/address pairs. Searching is done linearly using code that
optimizes to SIMD comparisons. For 4/8/16 slots overhead of the
search should be unmeasurably fast.
The key to the approach would be keeping it simple, and realizing that
the goal is only to get the lowest hanging fruit: repeated
assignments of large arrays used in a loop. If it's complex, skip it
--- the behavior will be no worse than current.
By the way, what's happening w...
2024 Jan 22
1
Use of geometric mean .. in good data analysis
On Mon, 22 Jan 2024, Martin Maechler wrote:
> I think it is a good question, not really only about geo-chemistry, but
> about statistics in applied sciences (and engineering for that matter).
> John W Tukey (and several other of the grands of the time) had the log
> transform among the "First aid transformations":
>
> If the data for a continuous variable must all be
2018 Mar 28
0
coxme in R underestimates variance of random effect, when random effect is on observation level
...d' frailty models are implemented in practice, to group people who are from a cluster to account for homogeneity in outcomes for people from the same cluster. I am more interested in the classic frailty model, 'Early frailty models incorporated subject-specific random effects to account for unmeasured subject characteristics that influenced the hazard of the occurrence of the outcome'. This is because I have data where I would like to estimate the amount of variation between patients risks that has not been accounted for by adjusting for the variables that I have.
I initially ran some s...
2002 Oct 21
3
How to fit Oggs in a specific amount of space?
I took 5 albums (Classical music) and converted them to Ogg Vorbis
at "Full Bitrate" (-q10) and all 5 directories take up about 775 Megs
which won't fit on a CD. So I ripped them again in WAV first (And
give my friend back his CDs) but now I wanna know what quality
setting should I use to fit them on 1 CD (The highest possible with
total space used just under 700 Megs)
2009 Mar 07
6
using a noisy variable in regression (not an R question)
Hi, This is not an R question, but I've seen opinions given on non R
topics, so I wanted
to give it a try. :)
How would one treat a variable that was measured once, but is known to
fluctuate a lot?
For example, I want to include a hormone in my regression as an
explanatory variable. However, this
hormone varies in its levels throughout a day. Nevertheless, its levels differ
substantially