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...13 0.00 5.26 > system.time (speed.ALTNROW(100000)) user system elapsed 3.84 0.00 3.85 For NCOL one could written a similar alternative specification. Best wishes, Sebastian --- Sebastian Kranz Department of Economics, University of Bonn http://www.wiwi.uni-bonn.de/kranz/ skranz@uni-bonn.de [[alternative HTML version deleted]]

Hi, I wonder whether similarly to the very quick rowSums and colSums functions in the base package, one could add quick functions that calculate the min or max over rows / cols in a matrix. While apply(x,1,min) works, I found out by profiling a program of mine that it is rather slow for matrices with a very large number of rows. A quick functionality seems to be already there in the

Dear List members, I really, like the feature that one can call R functions with mathematical expressions, e.g. curve(x^2, 0, 1) I wonder, how I can construct in a simple way a function like mycurve = function (expr) {...} such that that a call mycurve(x^2) has the same effect as the call curve(x^2, -100,100) Below is some code that works, but it seems much to complicated: it first