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mm s todo list for r martin maechler s todo list for r this page contains some of my plans for enhancements to r with absolutely no warranty you might also be interested in things no longer on the current list below martin maechler maechler r project org shorter term improve pair to allow spreading over a few pages wall paper a bit as lag plot from the ts package does improve it along the lines of catherine hurley even much easier plot factor should not do boxplots by default when the boxplot contains less than or only about 5 7 observations extend box to also accept bg and draw backgrounds using grect box bg green3 will then be a higher level alternative to code from demo graphics usr the dendrogram class package stats needs better and more versatile methods particularly plot one application is for the vlmc package available from cran here do as dendrogram vlmc properly and implement plot vlmc basically doing plot dendrogram as dendrogram vlmc done in parts for r 1 9 0 more todo minimum spanning tree two versions maybe in one function mstree using euclidean distance and the usual n x p data matrix robert has a simple mstree in his unofficial genecluster package in bioconductor though lacking friedman rafsky s planing option which should be easy to put into stats as is i really want to compute the general mst problem i e given an arbitrary graph with weighted edges find a subgraph which is a tree with minimal edge weight sum the typical application i have in mind would still be graphs with many edges i e almost complete ones procrustes is wanted but not just the two sample case and eventually at least also with case and variable weighting extend the guidelines for rd files say more about item in arguments also recommendation examples about the usage of describe and think about merging or moving parts into the writing r extensions manual which is part of r or available from the cran manuals cov wt should also work with na s with a use argument identical to cov cor using a notion of generalized ranks maybe could also grow spearman and kendall methods str for lists and data frames should get an option to allow numbering the list components maybe via a smart specification of the indent str argument of less priority need c api for the median and more generally quantile x alpha not sure anymore we have a c api to partial sorting stem should exclude outliers and list them separately as s does new print option for printing exact 0 s consider using instead of 0 in numerical matrices this would make sparse matrices much more readable i have been doing this with s plus for years scat1d improved rug the thing i ve co authored and has then been put into hmisc even longer term differential equation solvers i need a boundary value problem solver additional to the lsoda functionality of the very good odesolve package available from cran return to the r developer page last update at date 2004 06 04 17 42 50 utc aka gmt martin mächler seminar für statistik eth zurich switzerland