Discussion material by date
- 2016-08-11
- Discussion on MV analyses of K-Axis OTU data (Laurence C.), mvabund vs traditional approaches.
- Discussion of correlated covariates in regression, VIFs and "what's all the fuss about anyway" (Rowan T.).
- 2016-07-21
- Discussion about estimating volume of electron microscope critters with missing data on key length measurements (Bruce G.)
- 2016-05-26
- Discussion about RStudio notebooks (pre-release versions only)
- 2016-03-31
- Discussion of the utility of package mvabund for assessing species-species-environment interactions.
- 2016-03-24
- More model selection debate, a little on conditional inference trees, and some discussion of whale feeding biology.
- 2016-03-17
- Discussion of a simulation experiment to assess the efficacy of AIC/BIC in recovering interaction terms.
- 2016-03-10
- The ASA's statement on p-values: context, process, and purpose link. And don't forget the supplementary material that contains the individual views of the combatants.. um, I mean discussants.
- 2016-03-03
- Discussion of fitting multivariate binomial models to species presence/absence data (Aleks Terauds).
- Discussion of the merits of linear and non-linear interpolation of dose-response relationships when data are insufficient to support logistic-type models (Abby Proctor).
- 2016-02-25
- Discussion of sampling design for FOCE related work (James Black)
- Continuing discussion of random forests (Jim Dell)
- 2016-02-18
- Presentation by Spoon on selecting suitable starting values for broken-stick regression in JAGS; discussion of Gelman's views on EDA, data snooping and hypothesis testing; discussion of conditional inference trees.
- 2016-02-11
- Discussion of image analysis wrt quantifying snow coverage.
- 2016-02-04
- Discuss colorspace package and the choose_pallette() function - a swish GUI for viewing, manipulating and choosing HCL color palettes. Here's the link.
- Discuss length-weight relationships in animals; a good review paper can be found here.
- 2016-01-28
- Discuss efficiency of random forests for small n and possibilities for combining results from several univariate forests.
- 2015-12-17
- Review of David Warton talk "The modernisation of multivariate analysis in ecology", given at the recent IBS-AR Conference. A copy of David's talk can be found here.
- 2015-09-17
- Need to display high-dimensional data, spatially? Check out ?stars which can be plotted in x-y using the locations argument. Here's an example using 25-d species data and liberal use of alpha to highlight a single species. example
- 2015-09-10
- data.table: enhanced version of data.frame that allows blazing fast data manipulation. Some resources:
CRAN,
Matt Dowle's 2014 useR! tutorial, 71p,
data.table Cheatsheet,
Advanced tricks and tips
- Brushing points in lattice::splom (scatterplot matrix)
Run the first example from the splom help page, then add:
trellis.focus("panel", 1, 1)
panel.link.splom(threshold = 18)
Basic but easy. You'll need to edit lattice::panel.link.splom & lattice:::splom.linkPoint yourself if you want fancy.
- 2015-07-23:
- Choosing colours to accommodate colour-blindness (pdf, Rmd)
- Pan and zoom - Yihui Xie's original post that spawned the whale application (R-Dev link)
- 2015-06-25:
- Graticules for R (M.Sumner html)
- Video recording of Bayes Factor Workshop held 15-Jun-2015 in Hobart link
- 2015-05-07: AIC/BIC model selection (see here for an insightful seminar by Mark Brewer, and here2 and here3 for some papers that might revolutionise your thinking on the matter)
- 2015-04-16: Blue whale voyage, animation of sonobouy and call locations (html)
- 2015-02-19: Additive model fitting and diagnostics II (pdf, RMarkdown)
- 2015-01-29: Italics in plots via awful column names, eval/parse, and expressions. (pdf, RMarkdown)
- 2014-11-13: Confidence intervals for non-linear least squares models (using VB growth models as an example) (docx, RMarkdown)
