Displaying 20 results from an estimated 200 matches similar to: "Lack of independence in anova()"
2012 Sep 11
0
Question about logistic regression with ordered factor variable using the rms package (prev.Design)
Dear R users,
Hopefully someone can help me,
Maybe I just misunderstand the function in the package?
I am working with a logistic regression model.
Until now I always worked with the basic glm function, where for the model
was:
¡§ glm( disease ~ test.value + cnct , family=binomial(link=¡¦logit¡¦) ¡¨.
This works fine when test .value and concentration (cnct) are continuous
vairables.
However,
2007 Jul 14
3
How to read many files at one time?
I want to load many files in the R. The names of the files are "Sim1.txt", "
Sim2.txt", "Sim3.txt", "Sim4.txt", "Sim5.txt" and so on.
Can I read them at one time? What should I do? I can give the same names in
R.
Thanks.
For example:
> tst=paste("Sim",1:20,".txt",sep="") # the file names
> tst
[1]
2010 Dec 26
4
how to replace my double for loop which is little efficient!
Dear all,
My double for loop as follows, but it is little efficient, I hope all
friends can give me a "vectorized" program to replace my code. thanks
x: is a matrix 202*263, that is 202 samples, and 263 independent variables
num.compd<-nrow(x); # number of compounds
diss.all<-0
for( i in 1:num.compd)
for (j in 1:num.compd)
if (i!=j) {
S1<-sum(x[i,]*x[j,])
2012 Mar 16
2
Elegant Code
Hi,
Can anyone help to write a more elegant version of my code? I am sure
this can be put into a loop but I am having trouble creating the
objects b1,b2,b3,...,etc.
b1 <- rigamma(50,1,1)
theta1 <- rgamma(50,0.5,(1/b1))
sim1 <- rpois(50,theta1)
b2 <- rigamma(50,1,1)
theta2 <- rgamma(50,0.5,(1/b2))
sim2 <- rpois(50,theta2)
b3 <- rigamma(50,1,1)
theta3 <-
2008 Jul 23
1
Questions on weighted least squares
Hi all,
I met with a problem about the weighted least square regression.
1. I simulated a Normal vector (sim1) with mean 425906 and standard deviation 40000.
2. I simulated a second Normal vector with conditional mean b1*sim1, where b1 is just a number I specified, and variance proportional to sim1. Precisely, the standard deviation is sqrt(sim1)*50.
3. Then I run a WLS regression without the
2015 Feb 27
2
situation with ivr and four-channel gateway
2015-02-27 10:25 GMT-06:00 A J Stiles <asterisk_list at earthshod.co.uk>:
> O.K. So what does your existing Dial() statement in extensions.conf look
> like?
>
apology, put the gateway was sangoma but is a openvox ,
all my outgoing calls out for this context:
[my-mobile-out]
exten => _NXXXXXXX,n,Dial(SIP/1003/${EXTEN},55,rT)
exten =>
2009 Jul 31
1
superpose 2 time series with different time intervals
I could use some advice.
I've got 2 time series. Both cover approximately the same period of
time (ie, 1940 to 2009). But one series has annual data and the other
has monthly data. One refers to university enrollment; the other to
unemployment rates. Both are currently in the same data frame.
I'd like to use the monthly times series as a light grayscale
background for a plot of the
2004 Dec 28
1
R: repeat loops
To whoever this may concern
I am trying to write a repeat loop and can't make out from the documentation on the website how exactly to construct the repeat, break structure of the loop. Below is the function sim2.dat that I am trying to create, in which firstly I create n random uniform(0,1) numbers. From there I assign values to k, P and F. From then on for each random number u[j] of u, I
2010 Mar 14
3
the error in DoSimulateRF function
Hello,
I am a graduate student of University of Florida.
I am trying to run a process variation model and I am facing the following
error.
-------------------------------------------------------------
Analysis of geostatistical data
For an Introduction to geoR go to http://www.leg.ufpr.br/geoR
geoR version 1.6-27 (built on 2009-10-15) is now loaded
2017 Sep 13
0
[FORGED] [R-sig-Geo] circular spatial polygon
On 13/09/17 13:24, K?tia Emidio wrote:
> Dear Rolf,
>
> Thanks for your help!
>
> What I need is a spatial window with shape equal to the figure attached.
> This figure I made using ArcGis, but it is important to me make it in R.
> After having this figure I will make some analysis using spatstat among
> others. The points within figure are trees...
(1) I believe that
2002 Mar 21
0
RE: Radar track data
If you explain what radar track data is (for those like me who don't know)
and what your needs are more specifically a number of people would probably
offer pointers to R packages etc.
Reid Huntsinger
-----Original Message-----
From: Scott_Summerill_Summerill/ACT/CNTR/FAA.FAA at faa.gov
[mailto:Scott_Summerill_Summerill/ACT/CNTR/FAA.FAA at faa.gov]
Sent: Thursday, March 21, 2002 3:22 PM
To:
2010 Jan 29
1
FracSim set.seed
Hi,
I am using the FracSim library to simulate a time series. However, the
simulate function ignores my attempt to set the RNG seed I need for
reproducible research. The published docs and google have not yielded an
answer, so any help greatly received.
Thanks,
Selwyn
## Example code snippet
library(FracSim)
## simulate some 1d fractal data
set.seed(1234)
sim1 = fracsim.1d(h=0.5,k=1000,n=5000)
2007 Aug 28
4
Nodes & edges with similarity matrix
Hello,
I apologise if someone has already answered this but I searched and
googled but didn't find anything.
I have a matrix which gives me the similarity of each item to each
other. I would like to turn this matrix into something like what they
have in the graph package with the nodes and edges.
http://cran.r-project.org/doc/packages/graph.pdf . However I cannot find
a method to
2011 Aug 31
1
looping by grouping variable
Hello all,
I hope something is not already posted regarding this exact problem I am
trying to solve. I've read through the forums and previous postings and am
still confused as to how to approach this. Basically, what I am trying to do
is construct variables that utilizes an average of a variable from a
grouping, or higher order, variable. For instance, in my dataset I have
variables, with
2009 Aug 01
2
xyplot: superpose 2 time series with different time intervals
I could use some advice regarding xyplot.
I've got 2 time series. Both cover approximately the same period of
time (ie, 1940 to 2009). But one series has annual data and the other
has monthly data. One refers to university enrollment; the other to
unemployment rates. Both are currently in the same data frame.
I'd like to use the monthly times series as a light grayscale
background for a
2005 Mar 31
2
how to simulate a time series
Dear useRs,
I want to simulate a time series (stationary; the distribution of
values is skewed to the right; quite a few ARMA absolute standardized
residuals above 2 - about 8% of them). Is this the right way to do it?
#--------------------------------
load("rdtb") #the time series
> summary(rdtb)
Min. 1st Qu. Median Mean 3rd Qu. Max.
-1.11800 -0.65010 -0.09091
2011 Jan 09
3
Shortcut key to get to beginniing of line in R?
This is a generalize question: basically, say you are typing a long line of
command in R console, and then you realize you forgot to add something in
the beginning, is there a way to get to the beginning of the line without
pressing the "left" key on the keyboard and waiting for the cursor to get to
the beginning, or using the mouse?
I'm using windows version of R.
Thanks!
--
View
2015 Jun 07
21
[PATCH RFC 00/20] expose global performance counters
Hello,
This series exposes global performance counters (PCOUNTER) to the userspace
through the nvif interface by reworking most of the code related to the PM
engine.
This interface will allow the userspace to control and monitor complex hardware
events like the proprietary driver already does, for example with CUPTI and
PerfKit.
For now, this series only exposes performance counters on NV50,
2007 Aug 07
1
R2WinBUGS results not different with different runs
Hi All
I dont know if anyone else has noticed the same thing, but with 2 subsequent
runs of the same syntax, I am getting exactly the same results. I was expecting
that results differ slighlty, say in the 4th or 5th decimal place.
Is this a specialty with R2WinBUGS? Does it have something to do with the seed
value? Isnt the seed value reset everytime I restart winbugs?
Thanks Toby
2012 Jan 24
2
Null models of species co-occurrence
I am currently testing species co-occurrence patterns using null models and
the oecosimu() function within the vegan() package. My issue is that none of
the methods appear to be the ones that I want. The methods listed are r0,
r1, r2, r2dtable, swap, tswap. However, I want to know how to go about
implementing fixed row algorithms, as suggested in Gotelli 2000 in Ecology.
Also, the null models