Mikkel Meyer Andersen
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Ryacas version 1.1.0 publised in Journal of Open Source Software and released to CRAN
It is with great pleasure that I can announce that Ryacas version 1.1.0 has now been accepted into Journal of Open Source Software and …
Mikkel Meyer Andersen
Last updated on
Oct 14, 2019
2 min read
R
Variance in reproductive success (VRS) in forensic genetics lineage markers
Back in 2017, David Balding and I published the paper “How convincing is a matching Y-chromosome profile?”. One of the key parameters …
Mikkel Meyer Andersen
Last updated on
Oct 4, 2019
5 min read
Forensic genetics
Wolfe conditions for deciding step length in inexact line search: An example with the Rosenbrock function
In inexact line search (a numerical optimisation technique) the step length (or learning rate) must be decided. In connection to that …
Mikkel Meyer Andersen
Last updated on
Sep 20, 2019
6 min read
Statistics
Ryacas version 1.0.0 released!
It is with great pleasure that I can announce that Ryacas version 1.0.0 is now released to CRAN …
Mikkel Meyer Andersen
Last updated on
Aug 29, 2019
4 min read
R
,
R-bloggers
Approximating small probabilities using importance sampling
Update Oct 14, 2019: Michael Höhle caught a mistake and notified me on Twitter. Thanks! The problem is that I used \(\text{Unif}(-10, …
Mikkel Meyer Andersen
Last updated on
Oct 16, 2019
4 min read
Statistics
,
R-bloggers
How much pizza and how much frozen yogurt? ...with Gröbner bases
In a recent blog post I tried to get yacas to solve a system of polynomial equations. Unfortunately it could not do that, so I solved …
Mikkel Meyer Andersen
Last updated on
Sep 9, 2019
3 min read
R
,
R-bloggers
Prediction intervals for Generalized Additive Models (GAMs)
Finding prediction intervals (for future observations) is something different than finding confidence intervals (for unknown population …
Mikkel Meyer Andersen
Last updated on
Aug 28, 2019
4 min read
R
,
R-bloggers
The cost of evaluating an expression instead of using the language directly
In a recent blog post I used something like this (for use in a call to optim()): obj_fun_expr <- expression((x^4 + 4 * x^2 * y^2 - …
Mikkel Meyer Andersen
Last updated on
Aug 17, 2019
3 min read
R
Correlation is not transitive, in general at least: A simulation approach
Let \(\rho_{XY}\) be the correlation between the stochastic variables \(X\) and \(Y\) and similarly for \(\rho_{XZ}\) and …
Mikkel Meyer Andersen
Last updated on
Aug 28, 2019
6 min read
Statistics
,
R
,
R-bloggers
Automatic 'testthat' test skeletons with new R package 'roxytest' extending 'roxygen2'
It is important to test software. One approach is unit-testing, and for R packages this can e.g. be done using testthat. It is also …
Mikkel Meyer Andersen
Last updated on
Aug 28, 2019
3 min read
R
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