[R] Bubble plot on shapefile - projection issues?

Dear R help list,   I am working on some data from a study on the habitat use and movement patterns of fish using a marine protected area in Hawaii.  We have a number of acoustic receivers in a MPA, and any time a tagged fish passes within range it records the date and time of detection.  I am t

[R] using stepAIC with negative binomial regression - error message help

Dear List, I am having problems running stepAIC with a negative binomial regression model.  I am working with data on manta ray abundance, using 20 predictor variables.  Predictors include variables for location (site), time (year, cos and sin of calendar day, length of day, percent lunar illumi

[R] using stepAIC with negative binomial regression - error message

Ben, I tried playing with the "na.action" but that didn't seem to help.  I didn't know of the na.omit function.  It made it much easier to get rid of all the missing values in the file, and now the regression model is running. I hadn't put interactions in the model yet since it wasn't even runn

[R] Goodness of fit for negative binomial model

Dear r list,   I am using glm.nb in the MASS package to fit negative binomial models to data on manta ray abundance, and AICctab in the bbmle package to compare model IC.  However, I need to test for the goodness of fit of the full model, and have not been able to find a Pearson's Chi Squared st

[R] Subsetting data in a loop

I need some help with sub-setting my data.  I am trying to divide a data frame into multiple data frames based on the year collected, and stored in a list with each new data frame labeled with "year X" where X is the year the data was collected.  When I run my current code I get nine error messa

[R] Combining many files into one

I have a few hundred .csv files in a folder on my hard drive, and I would like to combine them all into one file.  They are all the same data, but the program that collected the data saved a file every 4 hours.  I can combine the files one at a time using rbind, but am having a problem automatin

[R] Faster way to combine data sets with different date ranges

I am trying to combine two data sets, one with daily values and one with weekly values.  SurveyData conatins environmental data collected on a daily basis.  sat.data contains satellite sea surface temperature that is an average of satellite measurements over a six day period.  I would like to co

[R] BRugs: error when compiling model

Using: R version 3.0.1 (2013-05-16) -- "Good Sport" Platform: x86_64-w64-mingw32/x64 (64-bit) OpenBUGS version 3.2.2 rev 1063 BRugs version 0.8-1 Hi there, When using the modelCompile() function in BRugs package I get the following error: Error in handleRes(res) : NA In addition: Warning mess