search for: sloiseau

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2009 Jan 20
2
Embeding R
...ateform (linux, mac os, windows). - The R engine must embed library, some of them having native code in C or Fortran. Does this sound reasonable? I would be very grateful to everyone providing links, references, feedback or advice on this question. Best regards, Sylvain -- Sylvain Loiseau sloiseau at ens-lsh.fr
2009 Dec 23
2
A package for visualizing R syntax
Dear all, I have written a small set of functions for drawing graphical representations of R objects and evaluations of R expressions. It is mainly intended for pedagogical purposes. Here are some samples: http://panini.u-paris10.fr/~sloiseau/sampleGraphics.pdf The idea is to use some graphical conventions in order to make clear the abstract syntax and to explain function, extraction, recycling, type conversion, properties of data structures, etc. I would be very interested in your reactions and comments. I'm wondering if it may b...
2009 Aug 26
1
Problem with standard generic methods in Matrix package
I have posted this message on r-lang, but it is perhaps more appropriate on r-devel: --- Hello, I'm puzzled by a problem with call to diag(), rowSums(), rownames() on objects of class "dgtMatrix", created by sparseMatrix() or spMatrix(). I use Matrix 0.999375-30. The weird thing is that I don't encounter any problem when I use this functions on the R prompt, or
2007 Apr 01
1
[newbie] mesuring adequation of normal distribution with a variable
Hello, I'm looking for a way of mesuring the adequation of a given variable with the normal distribution. Does R provide a standard test for this purpose, or is there a statistical methodology? Best, Sylvain Loiseau