Category: teaching

  • New plantations in AU, NZ and CL

    New plantations in AU, NZ and CL

    Looking at new forest plantations areas in Chile (data from INFOR), Australia (ABARES) and New Zealand (MPI) since 1994, as the Chilean dataset starts then. Interesting to see how the expansion of the forest estate collapsed in all three Southern Hemisphere countries at the start of the 2010s. Lately, New Zealand has seen an increase…

  • Leaking genetic gain: not quite a selection index

    Leaking genetic gain: not quite a selection index

    A few years ago I was talking with a breeder who spent substantial time running genetic analyses, with fairly sophisticated linear mixed models. From there the breeder obtained BLUPs for a couple of selection criteria (using an animal model with heterogeneous site variances), heritabilities, genetic correlations, etc. The typical stuff. Then came the leak: let’s…

  • The not-so-glamourous part of my job

    The not-so-glamourous part of my job

    Grading, grading, grading… 90 Regression Modelling final exams.

  • All that glitters is not GxE interaction

    All that glitters is not GxE interaction

    We are going over the fifth version(*) of a manuscript with a Ph.D. student and colleagues, polishing some details before submission, thinking about one of the results: basically there is little, if any, Genotype by Environment (GxE) interaction. There is a long history of studying GxE interaction in radiata pine, with parallels in the development…

  • Some love for Base R. Part 4

    Some love for Base R. Part 4

    Following on parts 1, 2 & 3—yes, a series—we arrive to part 4 revisiting Base R. See part 1 for the rationale, in case you’re wondering Whyyyy? A typical question going back to Base from the tidyverse: How do I join datasets? What do I use instead of bind_rows() and bind_cols()? Easy, rbind() and cbind(),…