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...n I do that? I have implemented the decreasing sorting by the code "PROTECT(R_fcall = lang3(install("sort"), x, desc));", but how to define the "index.return" argument? Thanks in advanced! -- Guozhu. Wen mail: guozhuwen@gmail.com douban: http://www.douban.com/people/wentrue/ blog: http://www.wentrue.net/blog/ twitter: https://twitter.com/wentrue [[alternative HTML version deleted]]

I have had some comments on sqldf regarding its dependence on tcltk such as the second last sentence on this blog post: http://translate.google.com/translate?hl=en&sl=zh-CN&u=http://www.wentrue.net/blog/%3Fp%3D453&prev=http://blogsearch.google.com/blogsearch%3Fhl%3Den%26ie%3DUTF-8%26q%3Dsqldf%26lr%3D%26sa%3DN%26start%3D10 sqldf does not directly use tcltk but it does use strapply in gsubfn for its parsing and strapply uses tcl from the tcltk package to it speed up -- there is also a...

...svd decomposition of sparse matrix. After no package was found, I get a good fortran/c package named svdpack/svdpackc http://www.netlib.org/svdpack/. I was wondering if there are any r-package for sparse matrix svd, or any packages implement the interface of svdpack/svdpackc? Thanks in advance! wentrue [[alternative HTML version deleted]]