In my work, I make extensive use of the statistical software package/environment R. One of the great strengths of R is the large number of add-on packages that extend the functionality of R (i.e., the functionality of the base/standard packages that are installed by default) in various ways. Here, I keep track and list packages that I make use of on a (semi)regular basis. My work would be many magnitudes more difficult if these packages (and R itself!) did not exist.
nlmfunctions). For root finding, I use the
optim), the Hooke-Jeeves algorithm, and the Mesh Adaptive Direct Searches (MADS) algorithm.
mvrnormfunction for generating data from a multivariate normal distribution and
fitdistrfor fitting univariate distributions.
kde2dfunction for 2d kernel density estimation and plotting.