Dear r-help,
I ran
output - lm(formu, data=mydata)
I want to look at the condition number (to see if the matrix is near singular). How?
Also, I use the function stepAIC from MASS to select models, how can I see the
condition numbers in each step?
While I am at it. I find a minor bug:
R
Uwe Ligges wrote:
Mai Zhou wrote:
Dear r-help,
I ran
output - lm(formu, data=mydata)
I want to look at the condition number (to see if the matrix is near singular).
How?
kappa(output)
Also, I use the function stepAIC from MASS to select models, how can I see the
Mai Zhou wrote:
Dear r-help,
I ran
output - lm(formu, data=mydata)
I want to look at the condition number (to see if the matrix is near singular). How?
kappa(output)
Also, I use the function stepAIC from MASS to select models, how can I see the
condition numbers in each
Dear All,
I suspect this is kind of dumb, but when I was under the thrall of the
dark lord (read, using a W2K box), all my work in R files came out as
foo.RData. I moved on to GNU/Linux, and all the old .RData files keep on
working as they used. No problems in loading and stuff. But I use R from
Federico Calboli [EMAIL PROTECTED] writes:
Dear All,
I suspect this is kind of dumb, but when I was under the thrall of the
dark lord (read, using a W2K box), all my work in R files came out as
foo.RData. I moved on to GNU/Linux, and all the old .RData files keep on
working as they used.
*.R is for the script file and is ASCII type.
*.Rdata (or sometimes *.rda) is the usual extension for R data and
contains binary information.
If you try to cat a *.Rdata file, you will end up with gibberish as it
is binary.
Try opening *.Rdata with emacs if you can. Emacs will recognise it as a
On Fri, 2003-10-03 at 13:16, Adaikalavan RAMASAMY wrote:
*.R is for the script file and is ASCII type.
*.Rdata (or sometimes *.rda) is the usual extension for R data and
contains binary information.
If you try to cat a *.Rdata file, you will end up with gibberish as it
is binary.
Try
The Statistical Computing Section of the American Statistical
Association announces the competition for the John M. Chambers
Statistical Software Award. In 1998 the Association for Computing
Machinery presented its Software System Award to John Chambers for the
design and development of S. Dr.
On a similar note, what are some alternative data editors that one might use
instead of the default R data editor? I'm not interested in Excel but
something that's freeware, easy to install and use. Any recommendations?
~Nick
- Original Message -
From: Juan Carlos Correa Morales [EMAIL
Hi,
Anybody knows if I c= an use deriv to implement CHAIN RULE AND
MATRIX
derivation.
Simple examples:
y=expression(log(x))
z=express= ion (x*y)
deriv(z,x) # chain rule
f=expression(det(x)) # where x is an (nxn) matrix
deriv(f, x)
Is ther= e any way to work around
I have not used this enough to really recommend it or not
but if you want to check it out yourself have a look at
EpiData at:
http://www.epidata.dk/
---
From: Nick Drew [EMAIL PROTECTED]
On a similar note, what are some alternative data editors that one might use
instead of the default
Federico Calboli wrote:
On Fri, 2003-10-03 at 13:16, Adaikalavan RAMASAMY wrote:
*.R is for the script file and is ASCII type.
*.Rdata (or sometimes *.rda) is the usual extension for R data and
contains binary information.
If you try to cat a *.Rdata file, you will end up with gibberish as it
is
Nick Drew wrote:
On a similar note, what are some alternative data editors that one might use
instead of the default R data editor? I'm not interested in Excel but
something that's freeware, easy to install and use. Any recommendations?
If you don't like Excel for financial or license reasons,
Hi,
I'm using a package that has a number of formats. I have C code to
parse these formats the results of which are generally integer arrays.
I would like to utilize these modules in R rather than writing R code to
read in these files (and also to learn about R extensions).
Essentially what I
On Fri, 3 Oct 2003, Rajarshi Guha wrote:
Hi,
I'm using a package that has a number of formats. I have C code to
parse these formats the results of which are generally integer arrays.
I would like to utilize these modules in R rather than writing R code to
read in these files (and also to
I pressed ^X in the wrong window. Here's the right code:
Here's some code that does a pointless example
In C:
#include Rinternals.h
/* function takes no arguments and returns an object */
SEXP pie(){
int n;
SEXP alist, avector;
/* work out how long a list to
On Fri, 2003-10-03 at 17:01, Rajarshi Guha wrote:
Hi,
I'm using a package that has a number of formats. I have C code to
parse these formats the results of which are generally integer arrays.
I would like to utilize these modules in R rather than writing R code to
read in these files (and
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