Displaying 20 results from an estimated 121 matches for "stimulated".
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simulated
2011 Nov 16
0
Maximum likelihood for censored geometric distribution
Hi all,
I need to check for a difference between treatment groups in the
parameter of the geometric distribution, but with a cut-off (i.e. right
censored). In my experiment I stimulated animals to see whether I got a
response, and stopped stimulating if the animal responded OR if I had
stimulated 10 times. Since the response could only be to a stimulation,
the distribution of response times is discrete (so I can't use survival
analysis). I am interested in assessing at wha...
2011 Jun 08
1
using stimulate(model) for parametric bootstrapping in lmer repeatabilities
Hi all,
I am currently doing a consistency analysis using an lmer model and
trying to use parametric bootstrapping for the confidence intervals.
My model is like this:
model<-lmer(y~A+B+(1|C/D)+(1|E),binomial)
where E is the individual level for consistency analysis, A-D are
other fixed and random effects that I have to control for.
Following Nakagawa and Scheilzeth I can work out the
2011 May 06
1
Uniroot - error
Hi,
I have tried to use uniroot to solve a value (value a in my function) that
gives f=0, and I repeat this process for 10000 times(stimulations). However
error occures from the 4625th stimulation - Error in uniroot(f, c(0, 2),
maxiter = 1000, tol = 0.001) :
f() values at end points not of opposite sign
I have also tried interval of (lower=min(U), upper=max(U)) and it won't work
as well.
2004 Oct 25
0
Stimulate others
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To Whom
2010 Feb 04
4
xyplot 3 panels 3 different Y variables
Often, when exploring a dataset, I'd like to plot several very different Y variables against the same X variable, in panels stacked one over the other. Is there an easy way to do this?
I'd like to achieve an elegant look similar to the look achieved by lattice in conditioned plots--for instance no space between panels. But unlike in straightforward conditioned plot, each panel may be on a
2007 Apr 27
0
Update of xlsReadWrite package
...the new
version is available on CRAN.
xlsReadWrite natively reads and writes Excel files (v97 - 2003).
o Changes from v1.1.1 to v1.3.3 (versions between never really published)
- ROWNAMES-support also for matrices (not only for data.frame)
- explicit rowNames argument in interface.
(stimulated by email Adrian Dusa)
- support for DATE and TIME values: Excel date and/or time values can
be retrieved as ISO-8601 format string.
- Either explicitly with the colClasses entries:
- "isodate" as "YYYY-MM-DD"
- "isotime" as "hh:mm:ss"...
2007 Aug 08
3
Subject: Re: how to include bar values in a barplot?
...the textual/numerical presentation to generate
a perception which could not possibly have been realised if they
had been presented separately. This, too, is a matter to be decided
in each case.
On that basis, if a graph without numbers fails to stimulate a
desired impression which could have been stimulated by adding the
numbers to the graph, then the graph without numbers is a failure.
> 2) it converts the graph into a poorly laid out table (with a
> colorful and distracting background)
>
> In general it is better to find an appropriate graph that does
> convey the information that is...
2010 Aug 18
5
ifelse command
hello people,
I want to make a biased dice using the sample() function and print out the
results after n number of runs, I've successfully generated the dice using
the following command:
mydie2<-function(n=1000,y=NULL,...){
for(i in 1:n){
x<-sample(1:6,n,replace=TRUE,prob=c(1,1,2,3,2,1)/10)
x=runif(n)
if(x<=1/10){y[i]=1}
else if(x<=2/10){y[i]=2}
else if(x<=4/10){y[i]=3}
else
2007 Sep 16
2
[LLVMdev] More Garbage Collection Questions
Gordon Henriksen wrote:
> On 2007-09-15, at 23:55, Talin wrote:
>
>> Gordon Henriksen wrote:
>>
>>> Can you be more specific the algorithm for which you need type
>>> metadata in a write barrier? No algorithms I am aware of perform any
>>> tracing from a write barrier.
>>
>> This one does:
>>
>>
2005 Apr 17
3
RFC: hexadecimal constants and decimal points
These are some points stimulated by reading about C history (and
related in their implementation).
1) On some platforms
> as.integer("0xA")
[1] 10
but not all (not on Solaris nor Windows). We do not define what is
allowed, and rely on the OS's implementation of strtod (yes, not strtol).
It seems that glibc...
2006 May 31
0
CT unit to drill on Mars, Revenue Up 200% - Ref. jh010 (PR#8918)
...g each of the zones would result in better recovery. Prior efforts had evolved from single-stage, limited entry treatments to multiple-stage treatments with composite frac plugs and frac baffles. microelectrophoretically
Core tests on offset acreage had revealed that 3 of 10 coal seams had not been stimulated by these treatments and, on average, ten feet of coal was not being effectively stimulated. If the CT fracturing approach is successful in improving this situation, CONSOL calculated that an additional net present value of 1 million could be added per 160-acre lease, based on a gas price of 2.50. T...
2006 Jun 19
1
useR! Thanks
After attending my first useR! conference I want to thank the organizers
for doing a wonderful job and the presenters for their high quality
presentations and stimulating ideas. The conference venue was
excellent and of course Vienna is one of the greatest cities in the
world to visit. useR! is one of the most fun conferences I've attended.
Thanks again!
--
Frank E Harrell Jr
2007 Jul 30
1
'non-standard' folder names in R package
Hi list,
I use a .xml file for a function's demo in the R package I'm creating.
Since it doesn't belong to any of the 'standard' folders, i.e. those
mentioned in the 'Writing R Extension', I put it in a folder call "myXML",
much like the 'iris.xl' file in 'xls' folder from 'gdata' package, for
example. After running R CMD build,
2014 Oct 14
1
low frequency content
Hello,
We are trying to figure out how to preserve the low-frequency content when
we try to convert a .wav file to an .opus file. What settings in Opus that
can accomplish this?
Sincerely,
Vinson Go
cid:image001.png at 01C94EE1.4DA09EF0
TBSI - SIMPLICITY in Neuro-Solutions
<http://www.tbsi.biz/> Tethered and Wireless Solutions for Neural Recording
and Stimulation
Vinson
2007 Nov 06
1
Problem with a non-factor, non-numeric variable in a data.frame
Dear R list,
I would like to perform an ANOVA in a set of measurements, but I have
problems formatting the data.
The data is a two dimensional array containing two columns:
- "Stim" : the type of stimulation (string)
- "Ratio" : a ratio of two numeric values
Now, because some values are missing in the data (defaulting to zero),
part of this array will be populated with NA
2005 Jan 21
1
Powell resigns
Breaking News - Powell resigns as FCC Chair
Federal Communications Commission (FCC) Chairman Michael Powell
announced his resignation today (January 21, 2005) and will step down in
March. In a brief statement on the FCC's website (www.fcc.gov) Powell
said, "Having completed a bold and aggressive agenda, it is time for me
to pursue other opportunities and let someone else take the reins
2018 May 24
1
USDA CVB recruiting statistician or data scientist
CENTER FOR VETERINARY BIOLOGICS
UNITED STATES DEPARTMENT OF AGRICULTURE
Join our team of statisticians and data scientists in 2018
We bring a broad perspective to our consulting and analytical work
with scientists at the USDA National Centers for Animal Health. Our
Statistics Section is looking for a good communicator who is
comfortable dealing with the analytical aspects of practical
2002 Jun 20
1
Psychometric curves, two altnerative force choice, glm, and budbworms
Dear R-Listers,
to measure the psychometric curve of pitch discrimination, one sequentially
presents two tones of slightly different pitch to an observer (animal will
do), and asks "which is higher". The pschometric curve is the fraction of
correct responses plotted against the pitch difference. It passes through
50% (pure guessing) at zero and normally approaches 100% at large
2003 Jun 11
1
COX PH models for event histories?
This is a question about the use of the Cox proportional hazards model to analyze event histories.
I am looking at the responses of sympathetic nervous system activity to a stimulus. The activity I observe is a burst that can only occur once per heart beat cycle (e.g., a binary count). Typically bursts occur in 60-80% of the heart cycles * sensory stimuli can modify these burst probabilities.
2005 Sep 01
1
More block diagonal matrix construction code
...he arguments into a matrix of 0's of the right dimensions. About the
only thing to notice is that the apply() construction returns either a list
or matrix depending on whether a matrix is square or not (a subtlety that
tripped me up in my first version of this code).
I would be pleased if this stimulated others to come up with cleverer/more
elegant approaches that they would share, as it's the sort of thing that
I'll learn from and find useful.
Cheers to all,
Bert Gunter