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10 results for “from:Nicola Batchelor”

Binom.krige.bayes sim.predict question
Nicola Batchelor · Jul 29, 2009 · r-sig-geo

Dear list, I've been using geoRglm for parameter estimation and spatial predictions for a disease dataset along with 3 predictor variables. I just have a quick question about the option sim.predict in output.glm.control - am I correct...

autologistic model in R
Nicola Batchelor · Jan 14, 2009 · r-sig-geo

Dear all, I'm currently using a logistic regression model for my dataset, which has a binary outcome of 0 or 1. I've looked at the residuals, which are spatially autocorrelated, so I want to do an autologistic regression...

Multivariate spatio-temporal modelling
Nicola Batchelor · Mar 24, 2010 · r-sig-geo

Dear list. I've completed a spatial GLM analysis of a dataset with one outcome variable (binomial) using geoRglm. I now want to go on to extend this analysis in 2 ways: 1) incorporating a temporal element and 2) using...

Prediction locations for kriging in geoR
Nicola Batchelor · Aug 29, 2008 · r-sig-geo

Hi, Im using geoR and I'm trying to do some predictions, based on an external trend, using ordinary kriging. However, I seem to be getting some strange results from my kriging, which I think must have something to do...

Prediction locations for kriging in geoR
Nicola Batchelor · Aug 29, 2008 · r-sig-geo

Hi Thierry, Thanks for the suggestions. I hadn't tried that previously, but no it doesn't make any difference unfortunately. I removed the separate predpoints dataframe from it and tried using the x and y values from the covars...

Multivariate spatio-temporal modelling
Nicola Batchelor · Mar 25, 2010 · r-sig-geo

Hi Danlin, Thanks. If Im honest I don't know much about GWR and also I'm rubbish at coding (I come from an epidemiology background, not spatial analysis), so ideally for me whichever package I use will have lots...

Binom.krige.bayes strange uncertainty outputs
Nicola Batchelor · Aug 3, 2009 · r-sig-geo

Dear list, I'm having a few problems with my uncertainty outputs from the command binom.krige.bayes in geoRglm. I am getting sensible looking predictive medians, and 2.5% quantiles, but the upper quantile and also the uncertainty outputs...

imaging geoRglm binomial krig
Nicola Batchelor · Mar 5, 2009 · r-sig-geo

Hi Ken, I've also been using geoRglm for similar analyses, and found the prediction to be a bit fickle when it comes to the prediction grids! I was having similar problems to yours and the only thing that I...

Multivariate spatio-temporal modelling
Nicola Batchelor · Mar 25, 2010 · r-sig-geo

Hi Andy, I was just reading something you wrote about spBayes and was thinking about emailing you for advice! The data I currently have is 1000's of village locations with counts of human disease (and population data, so I...

Model Based geostatistics and covariance models
Nicola Batchelor · Apr 1, 2009 · r-sig-geo

Dear list, I'm using geoRglm with the log link function and a number of covariates. I'm having convergence and mixing problems with my MCM algorithms and my supervisors and I have come up with a few suggestions for...

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