At 11:59 PM 8/4/2005, C NL wrote:
>Hi,
>
> I'm a newbie in R and don't much aobut all the
>modules and their capabilities, but I'm interested in
>solving a problem about a discriminant analysis done
>with SPSS tool. The thing is that I would like to make
>a discrimant analysis similar to th
by
Therneau and Atkinson. If you combine that with Andy Liaw's
"randomForest", you have a pretty potent set of tools. If you really
want "CART", you need to contact Salford Systems for their
implementation and pay their very expensive licensing fees.
Dr. Marc R Feldesman
At 01:59 PM 1/28/2005, Peter Dalgaard wrote:
>"Marc R. Feldesman" <[EMAIL PROTECTED]> writes:
>
>> At the risk of being flamed for mortal stupidity, I'm trying to figure
>> out what could have possibly changed (at my end almost certainly) that
>> make
se Eudora, Thunderbird, or webmail clients to
read/respond to them.
Thanks for any help and/or suggestions for solving this mystery.
Dr. Marc R. Feldesman
Professor and Chairman Emeritus
Anthropology Department - Portland State University
email: [EMAIL PROTECTED]
email: [EMAIL PROTECTED]
At 08:45 AM 7/12/2004, marzban wrote:
>
>Hello,
>
>For a simple problem with 1 predictor (x) and 2 classes (0 and 1), the
>linear discriminant function should be something like
>
> 2(mu_0 - mu_1)/var x+x-independent-terms
>
>where var is the common variance.
>
>Question 1: Why does lda() r
s, this is a major nuisance.
>
Feel free to contribute to the project. Whining and complaining won't get
you anywhere. SAS *is* faster at I/O. So what?
Dr. Marc R. Feldesman
Professor and Chairman Emeritus
Anthropology Department - Portland State University
email: [EMAIL PROTECTED]
email: [EM
At 10:11 AM 6/14/2004, Sven Hartenstein wrote:
>Hi,
>
>I would like to extract the p-value of the F-statistic of a aov-object's
>summary.
>
>Getting the p-value is so easy with t-tests (t.test(g1, y = g2,
>var.equal = FALSE)$p.value), but I couldn't find anything like that for
>ANOVAs.
>
>Any help
At 12:00 PM 5/30/2004, Roger D. Peng wrote:
>Is it possible you have a locally modified version of
>summary.lm() lying around. Here are the first few lines of
>summary.lm() in R 1.9.0:
>
That was the problem. But since I've never even looked at summary.lm until
the past few days when this error
12
language R
I'd be perfectly happy to be straightened out here.
Thanks.
Dr. Marc R. Feldesman
Professor and Chairman Emeritus
Anthropology Department - Portland State University
email: [EMAIL PROTECTED]
email: [EMAIL PROTECTED]
fax:503-725-3905
"Don't knock on my door i
At 05:16 AM 4/2/2004, Carlisle Thacker watched in amazement as electrons
turned into magical things called words:
>Marc,
>
>It is very difficult for the eye to distinguish even 25 symbols or 25
>colors on the same plot. I find that my brain tends to saturate at 5 of
>each, and using 5 symbols eac
Is there any effective way to get distinct geometric plotting symbols and
colors for plots involving more than 25 groups?
Thanks.
Dr. Marc R. Feldesman
Professor and Chairman Emeritus
Anthropology Department - Portland State University
email: [EMAIL PROTECTED]
email: [EMAIL PROTECTED]
fax
At 12:28 PM 3/17/2004, Ed L Cashin wrote:
I hope this response isn't indicative of the speed with which gmane posts
messages. I think this entire thread was more than 7 or 8 months ago,
possibly longer.
>"Roger D. Peng" <[EMAIL PROTECTED]> writes:
>
>> Marc R
At 04:23 AM 1/23/2004, Mike White wrote:
>With predict.lda the posterior probabilities only relate to the existing
>Class definitions. This is fine for Class definitions like gender but it is
>a problem when new data does not necessarily belong to an existing Class.
>Is there a classification meth
At 07:58 AM 1/21/2004, Dave Andrae wrote:
>I seem to remember, from a course in which I used SPSS for LDA, that
>Box's M is an ultra-sensitive test as well and that in almost all
>practical applications it's not useful, so Prof. Ripley's comments
>apply to that test, too.
Professor Ripley is quite
At 06:13 PM 12/19/2003, Yun-Fang Juan wrote:
>Hi,
>I try to run the linear discriminant analysis using the following command
>but got an error like the following.
>lda1 <- lda(retention ~ . , data=RetentionDF40[1:1,]);
>
What error did you get? Did you read the help file for lda? What version
At 10:09 PM 7/12/2003, dg gdf wrote:
>I am student in Iran(IUT) that work on R software as
>my project. I need to some data frames in version
>1.7.0, but these are not available. please help me.
>
>__
It isn't clear exactly what help you need. We are mos
At 07:17 AM 5/30/2003, Mike Prager wrote:
>I probably shouldn't suggest this, because I can't volunteer to implement
>it. However, I bring it up in the hopes that if (1) others agree and (2)
>the R core group think it a good idea that a suitable volunteer will come
>forward.
>
>I am finding that t
entation of 1.5 might be very different
from what you think it is. If you've done any programming at all, this is
one of the first lessons you learn about "real" numbers and computers.
Dr. Marc R. Feldesman
Professor and Chairman Emeritus
Anthropology Department - Portland State
At 01:10 PM 2/1/2003, Roland Goecke wrote:
>But what is the proportion of trace?
>
Is the proportion of variance explained by each successive discriminant.
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At 01:10 PM 2/1/2003, Roland Goecke wrote:
>Hi,
>Is there a simple way to get the discriminant score or do I have to
>manually multiply the coefficients with the data?
predict.lda will generate an object with a scores component, among other
things.
Try ?predict.lda
___
An Introduction to R, The R Core Team
An Introduction to Statistics with R, Peter Dalgaard
Modern Applied Statistics with S, W.N. Venables and B.D. Ripley, 4th Edition.
And many others with links on http://cran.r-project.org/ under
"Contributed|Documentation"
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