Displaying 3 results from an estimated 3 matches for "f6ran_brostr".
2002 Dec 09
0
Re: R-help digest, Vol 1 #10 - 6 msgs
...reach the person managing the list at
> r-help-admin at stat.math.ethz.ch
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of R-help digest..."
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> Today's Topics:
>
> 1. Re: fortran -> R (=?iso-8859-1?Q?G=F6ran_Brostr=F6m?=)
> 2. Re: R 1.6.1 segmentation fault (David Meyer)
> 3. simplex(boot) problem (George LeCompte)
> 4. bugs in system() handling long character strings?? (Naoki
Takebayashi)
> 5. Re: bugs in system() handling long character strings??
(ripley at stats.ox.ac.uk)
> 6....
2002 Mar 21
2
optim with gradient
> Date: Wed, 20 Mar 2002 14:31:03 +0100 (CET)
> From: =?iso-8859-1?Q?G=F6ran_Brostr=F6m?= <gb at stat.umu.se>
> Subject: [R] optim with gradient
>
> I want to maximise a function using 'optim' with a method that requires
> the gradient, so I supply two functions, 'fun' for the function value
> and 'd.fun' for its gradient. My question i...
2000 Feb 14
2
Error in the inverse of a diagonal matrix?
I?m new to R so maybe this issue has been asked before and I still could not read the complete set of past messages sent to the list.
I found a weird behabiour that I will explain with a simple example. Lets consider the following block of commands:
> x <- diag(c(1,4,10))
> x
[,1] [,2] [,3]
[1,] 1 0 0
[2,] 0 4 0
[3,] 0 0 10
> invx <- x^-1
> invx