Displaying 4 results from an estimated 4 matches for "mirant".
2002 Dec 12
4
sum a list of vectors
In Mathematica there is a neat feature, where you can change the head of a list from "list" to say "+" and obtain a sum of the list elements.
I can't find a way to sum a list of vectors of same length or list of matrices of the same dimension and was curious if something like that exists in R. do.call("+",list) doesn't work because "+" accepts only
2001 Sep 24
1
Problem with read.table and scan
...d to the best of my knowledge am using the correct
syntax. The error message I receive is
Error in file(file, "r") : cannot open file [file name]
I have the data in text files in white-space delimited form. I put them in
the rw1031 directory.
Thanks,
Uriel Scott
Quantitative Analyst
Mirant Americas, Inc.
678-579-3226
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2002 Mar 07
8
linear correlation?
Whether the two variables have the same units does not matter. Moreover,
even if there were some way of converting cm to kg the correlation would
still be the same because the correlation is invariant under unit conversion
as it is invariant under multiplication of its arguments by a constant.
As for your second question, the correlation estimator is a continuous
function of each of the
2003 May 09
4
getAttr problem
Hi all,
It seems that getAttr doesn't return "names" attribute properly as in
getAttrib(x, R_NamesSymbol));
If you look at section 4.7.4 in "Writing R Extensions", the second example of
SEXP out(SEXP, SEXP) returns NULL for the names attribute of the
outer product.
This is true for R 1.7.0 on both Win2000 with mingw and Redhat 9.0 with gcc.
Is there something I am