Displaying 20 results from an estimated 1000 matches similar to: "mixed models for analyzing survey data with unequal selec tion probability"
2004 May 21
0
[Fwd: Re: mixed models for analyzing survey data with unequal selection probability]
Hi, All
Thanks to Robert Baskin, Thomas Lumley, and Spencer Graves for the
valuable helps. I have learned a lot from this discussion.
I put all discussions together without editing, so we can see how things
are evolved. Likely, I have a lot of articles to read. As in the
discussion, mixed modeling approach is a poosible but may be over-kill
in my posted data analyses. I will explore other
2004 May 07
1
sampling weights for lme
Dear All,
I have a complex survey data with observations having differing
probabilities of selection into the sample. I would like to run a
linear mixed effects model and also to use weighting that takes this
into consideration. As far as I know, however, the weighting option for
the lme command from nlme package (or glmmPQL from MASS, for that
matter) is related to heteroscedasticity. Is there a
2004 Aug 26
5
GLMM
I am trying to use the LME package to run a multilevel logistic model
using the following code:
------------------------------------------------------------------------
-------------------------------------------
Model1 = GLMM(WEAP ~ TSRAT2 , random = ~1 | GROUP , family = binomial,
na.action = na.omit )
------------------------------------------------------------------------
2010 Feb 26
1
RODBC looping sql script
Dear R users,
I am querying an Oracle database using sqlQuery() from the RODBC
package. What I would like to do is embed my R Sql query in a for loop.
For example
suppose the data.frame "vessel" contains two columns: vessel[,1]= vessel
id and vessel[,2]=permit year
I am using "vessel" as an input in a SQL based function that require
inputs of permit year and vessel id
2008 May 23
1
Create a data subset
Hello,
I want to select same data of a data frame that has information of fish
catches:
catch, vessel, trip, day, month, year
where trip is the fishing operation number done in each day by each vessel,
i.e. for each day, any vesel can have several register of catch
corresponding to each operation.
>From this data frame I want to do:
1. Add the catches of all trip by vessel and day; then
2012 Nov 03
1
Violin plot of categorical/binned data
Hi,
I'm trying to create a plot showing the density distribution of some
shipping data. I like the look of violin plots, but my data is not
continuous but rather binned and I want to make sure its binned nature (not
smooth) is apparent in the final plot. So for example, I have the number of
individuals per vessel, but rather than having the actual number of
individuals I have data in the
2013 Oct 24
2
track on boats
Hi professors
I'm finding the best package in R for manage a big database about vessels. I need to divided the travel of each boat into tracks. I have GPS points.
I would join these points in a line on the map. I make that with the function "lines", but I can't divided by vessel or by track,
I saw several packages, for tracking animals but they had specifically variables. And I
2012 Nov 27
1
glm convergence warning
Hello,
When I run the following glm model:
modelresult=glm(CID~WS+SS+DV+DS, data=kimu, family=binomial)
I get the following warning messages:
1: glm.fit: algorithm did not converge
2: glm.fit: fitted probabilities numerically 0 or 1 occurred
What I am trying to do is model my response variable (CID: correct bird
identification) as a function of the predictor variables weather state
(WS), sea
2012 Oct 25
5
trying ti use a function in aggregate
Hi -I am using R v 2.13.0. I am trying to use the aggregate function to
calculate the percent at length for each Trip_id and CommonName. Here is a
small subset of the data.
Trip_id Vessel CommonName Length Count
1 230 Sunlight Shad,American 19 1
2 230 Sunlight Shad,American 20 1
3 230 Sunlight Shad,American 21
2013 Sep 09
1
Fitting Arima Models and Forecasting Using Daily Historical Data
Hello everyone,
I was trying to fit an arima model to a daily historical data, but, for
some reason, havent been able to.
I basically have 212 observations (from 12/1/2012 to 06/30/2013) containing
the number of transits for a particular vessel.
The following messages are produced by R:
dailytrans.fit<-arima(dailytrans$transits, order=c(0,1,2),
seasonal=list(order=c(0,1,2), period=365),
2007 Feb 27
3
rpart minimum sample size
Is there an optimal / minimum sample size for attempting to construct a
classification tree using /rpart/?
I have 27 seagrass disturbance sites (boat groundings) that have been
monitored for a number of years. The monitoring protocol for each site
is identical. From the monitoring data, I am able to determine the
level of recovery that each site has experienced. Recovery is our
2007 Mar 27
1
gam parameter predictions --Sorry for double posting
R-help,
Sorry for posting again the same question (dated 26-03-2007) but
all my mails have been sent to the recycle bin without possibility
of recovering and thus I don't know if anyone has answer my query.
Here is the original message:
I'm applying a gam model (package mgcv) to predict
relative abundances of a fish species.
The covariates are year, month, vessel and statistical
2017 Jul 10
2
Problems with time formats when importing data using readHTMLTable
Hi,
I am extracting positions data from the marine traffic website. The
table has a "Timestamp" column which, in the browser, appears with the
format yyyy-mm-dd HH:MM (UTC), e.g. 2017-07-10 14:04 (UTC).
When I import the table, the same date "2017-07-10 14:04 (UTC)" appears
as "1499696500149969650021 minutes ago", This is the more recent date
and time. Older
2008 Jul 02
1
Insert text in data.frame
Dear R-helper,
I wonder if anyone can help me. I am trying to convert a dataset to a
format recognizable by a software onboard a research vessel but I am
having problems with some steps.
I have a data frame as follows:
Conc Lat Lon Depth
Point0000 56.25 -5.65 70
Point0001 56.55 -5.35 85
Point0002 56.25 -5.65 65
Point0003 56.37
2004 Aug 19
1
The 'test.terms' argument in 'regTermTest' in package 'survey'
This is a question regarding the 'regTermTest' function in the 'survey' package. Imagine Z as a three level factor variable, and code ZB and ZC as the two corresponding dummy variables. X is a continuous variable. In a 'glm' of Y on Z and X, say, how do the two test specifications
test.terms = c("ZB:X","ZC:X") # and
test.terms = ~ ZB:X + ZC:X
in
2002 Aug 12
1
question about cloud() in lattice package
Hi all,
I have been previously been using scatterplot3d package to create some graphs but unfortunately it does not allow me to rotate the
plot on all three axis. The cloud() function in the lattice package does allow me to do so. When I was using scatterplot3d I was
using a script (Shown Below) to calculate the mean, quartiles and range limits for all three axis and I was representing that on the
2015 Apr 19
2
Possible Security Hole (Bug?)
Hi Andrey,
2015-04-19 0:12 GMT+02:00 Andrey Repin <anrdaemon at yandex.ru>:
> Greetings, Davor Vusir!
>
>>> Hi, there are two separate points of view here, map 'Administrator' to the
>>> 'root' user, or give 'Administrator' a uidNumber. If you do the first then
>>> 'Administrator' can change directory settings on a Unix
2017 Jul 11
2
Problems with time formats when importing data using readHTMLTable
Dear Jeff,
I am sorry, I didn't notice that it was not plain text. I hope that it
is now in the correct format. I explain the problem again, now with more
detais.
I am collecting the track positions of our research vessel from
www.marinetraffic.com. In the page, the data appear in a table:
Timestamp Source Speed (kn) Latitude (?) Longitude (?)
Course (?) Show on Map
2017 Jul 10
0
Problems with time formats when importing data using readHTMLTable
Not reproducible. [1][2][3] If our answers don't seem to apply to your situation, it will likely be because you did not explain your question clearly.
Not plain text. This is a plain text mailing list, and the best-case scenario when you let your email program send HTML is that what you saw is not what we see (worst case is your email is scrambled on our end).
Have you read the
2017 Jul 11
1
Problems with time formats when importing data using readHTMLTable
Dear David,
Thank you very much. You have solved my problem, not of importing in
the right format but the date conversion. It works for me, and if I
specify the timezone tz='GMT', I get exactly the same time of the
webpage.
Sincerely yours,
Cristina
On Tue, 11 Jul 2017 07:15:43 -0700, David Winsemius wrote:
>> On Jul 11, 2017, at 6:25 AM, Cristina Silva <csilva at