I had a question about Random Forests. I have a text file with 10
dichotomous variables and a bivariate response vector. I read this file
into R as a data frame, and then used the command randomForest(Response ~.,
dataset, etc.. where Response is the column header of the response
variable and
On Fri, 2007-05-04 at 12:05 -0500, Bill Vorias wrote:
I had a question about Random Forests. I have a text file with 10
dichotomous variables and a bivariate response vector. I read this file
into R as a data frame, and then used the command randomForest(Response ~.,
dataset, etc.. where
Bill,
A couple more points:
1. Please use an informative subject line. I'd deleted the original
post w/o reading if I didn't catch Marc's reply.
2. Are you sure you have bivariate response? To me bivariate means
two variables, and randomForest surely does not handle that (at least
Hello Colleagues,
I programmed in SAS for 3 years and would like to switch to a not so costly
software product.
Hence I started to evaluate R, and my first test look promising.
However I have some question:
1. Is it possible to query R files by SQL internally on data frames (not on
a
Thorsten Muehge wrote:
Hello Colleagues,
I programmed in SAS for 3 years and would like to switch to a not so costly
software product.
Hence I started to evaluate R, and my first test look promising.
However I have some question:
1. Is it possible to query R files by SQL internally
Thorsten Muehge MUEHGE at de.ibm.com writes:
1. Is it possible to query R files by SQL internally on data frames (not on
a database) and how is the syntax (I have the RODBC package installed).
It is possible to do similar things conceptually in R as in SQL---at least the
basic SQL queries (I
For your 1st question, you can write query against the tables in DB using RODBC.
Being a SAS programmer, I have to say that reporting function of R is
not as good as that of SAS.
On 9/13/06, Thorsten Muehge [EMAIL PROTECTED] wrote:
Hello Colleagues,
I programmed in SAS for 3 years and
Wensui Liu wrote:
For your 1st question, you can write query against the tables in DB using
RODBC.
Being a SAS programmer, I have to say that reporting function of R is
not as good as that of SAS.
I beg to differ. See for example
http://biostat.mc.vanderbilt.edu/StatReport
Frank Harrell
well, Harrell,
I understand sweave or R2html could be a solution.
but please show me their applications in a large business setting. On
the contrary, I can give you many such cases using SAS.
On 9/13/06, Frank E Harrell Jr [EMAIL PROTECTED] wrote:
Wensui Liu wrote:
For your 1st question,
Wensui Liu wrote:
well, Harrell,
I understand sweave or R2html could be a solution.
but please show me their applications in a large business setting. On
the contrary, I can give you many such cases using SAS.
SAS requires much more coding than R/S-Plus to produce reports that are
not
[EMAIL PROTECTED]
(801) 408-8111
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Thorsten Muehge
Sent: Wednesday, September 13, 2006 4:18 AM
To: r-help@stat.math.ethz.ch
Subject: [R] R-question
Hello Colleagues,
I programmed in SAS for 3 years
Please,
1. read the posting guide
2. use a sensible subject line
3. this is NOT an r question
4. ask your teacher to explain your homeworks, but not this list
Uwe Ligges
yuying shi wrote:
If there are two random variable X1 and X2 which have
a bivariate normal distribution with mean vector
Uwe Ligges [EMAIL PROTECTED] writes:
Please,
1. read the posting guide
2. use a sensible subject line
3. this is NOT an r question
4. ask your teacher to explain your homeworks, but not this list
Uwe Ligges
And, btw, neither the mean nor the variance exists, so the question is
If there are two random variable X1 and X2 which have
a bivariate normal distribution with mean vector (10,
10)and variance covariance matrix
[21.95
1.953]
How to calculate the mean and variance of the function
Y=X1/X2?
Thanks a lot!
xingyu
Hi,
Would you help me solve the following question? Thanks.
my program is as follows:
library(mvtnorm)
value-pmvnorm(lower=-Inf, upper=-2.178, mean=0, sigma=1)+
pmvnorm(lower=2.178, upper=Inf, mean=0, sigma=1)+
house-ball wrote:
Why do you repeat an unclear question fou times? Please read the posting
guide.
It is not clear what is your problem.
Kjetil halvorsen
Hi,
Would you help me solve the following question? Thanks.
my program is as follows:
library(mvtnorm)
value-pmvnorm(lower=-Inf,
Hi,
Would you help me solve the following question? Thanks.
Question: If I try to set the probability=0.05 and find the approximate x. (The answer
should be somewhere between 2.1782 and 2.1783.)
I write about this R program as follows but I don¡¦t know how to get the value of x
which is
house-ball wrote:
Hi,
Would you help me solve the following question? Thanks.
Question: If I try to set the probability=0.05 and find the approximate x. (The answer
should be somewhere between 2.1782 and 2.1783.)
I write about this R program as follows but I don¡¦t know how to get the value of x
Hi,
Would you help me solve the following question? Thanks.
Question: If I try to set the probability=0.05 and find the approximate x. (The answer
should be somewhere between 2.1782 and 2.1783.)
I write about this R program as follows but I don¡¦t know how to get the value of x
which is
Hi;
Is there a faster way to run this code?
Ab- matrix(numeric(1),nrow=2,ncol=1000)
Bb- matrix(numeric(1),nrow=2,ncol=1000)
for(j in 1:1000) {
for(i in 1:1000) {
eq- sample(stud,replace=T)
ystar- beta.r*x+eq+b0
Ab[,i]- wwfit(x,ystar)$coef
Dear R community,
I would like to conduct a simulation study that involves the
generation and recovery of times series spectra. Spectrum analysis
is a new area for me so I am very much in the crawling stage at this point.
I am having difficulty understanding the output of the spec.pgram (or
to read in a data set as a data frame from
an external package?
On Sat, 12 Jul 2003, dg gdf wrote:
Date: Sat, 12 Jul 2003 22:09:59 -0700 (PDT)
From: dg gdf [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: [R] r-question
I am student in Iran(IUT) that work on R software as
my project. I need
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.
__
[EMAIL PROTECTED] mailing list
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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 most
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