I am using R in Windows. I see that I will have to use batch processes with
R. I will have to read and write text files, and run some R code; probably
some external code too. I have never done scripting. Is there any document
that explains simple steps with examples? I also have heard that Python
Let us say I have a time series I want to forecast. I have decided I am
going to use ppr, nnet and svm. I calibrate my model with these 3 algorithms
(let us assume I use all the data for the calibration; I do not distinguish
here between training and testing: all data are used for training, just
In the middle of my code, I have the following:
write.table(PredictionTest, file = predictions.txt)
what I would like is that inmediately after this line is executed, the file
predictions.txt is opened in the middle of my screen (not in my R session,
where I continue running my code). Is there
PROTECTED]
Sent: 23 November 2005 19:39
To: Molins, Jordi; 'r-help@stat.math.ethz.ch'
Cc: Jordi Molins
Subject: Re: [R] How to open a text file in my screen (not in the R
session)?
You could use the following istruction:
system(notepad predictions.txt,wait=FALSE)
I hope
Dear list users,
I need to learn about MCMC methods, and since there are several packages in
R that deal with this subject, I want to use them.
I want to buy a book (or more than one, if necessary) that satisfies the
following requirements:
- it teaches well MCMC methods;
- it is easy to
Dear list,
when I execute
library(mda)
x1 - rnorm(10,mean=1,sd=.12)
x2 - rnorm(10,mean=.6,sd=.12)
y - pp(x1,1)+pp(x1,1)*pp(x2,.6)+.12*rnorm(length(x1))
mymars - mars(cbind(x1,x2),y,degree=2)
mymars$cuts
mymars$factor
I get what I expected. Instead, when I execute
x1 -
I have forgotten to list the definition of pp. Here it is:
pp - function(x,a) {ifelse(xa, x-a, 0)}
__
Dear list,
when I execute
library(mda)
x1 - rnorm(10,mean=1,sd=.12)
x2 - rnorm(10,mean=.6,sd=.12)
y -
Dear R Users,
I want to make a call from R into C++. My inputs are List1, List2, List3,
IntegerID. The amount of elements of the lists and their type depend on
IntegerID. Typical elements of a given list can be vectors, doubles, and
even other lists. I want to return also a list (whose nature
Hello,
I was just testing the MASS code examples for chapter 10 (Random and Mixed
Effects) and I have pasted the following code in an R session (2.1.0 in
windows 2000 professional; I have also Xemacs + ESS installed, but I was not
using them at that time; my machine has quite a lot of RAM):
Hello,
I have been looking around in past helps about cross-correlations for a set
of n time series.
Although you can do it by yourself calculating the out-of-the-diagonal terms
in the cross correlation matrix by using pairwise combinations of ccf and
the diagonal terms by using acf, this does
Hello to everybody,
I have a quadratic programming problem that I am trying to solve by various
methods. One of them is to use the quadprog package in R.
When I check positive definiteness of the D matrix, I get that one of the
eigenvalues is negative of order 10^(-8). All the others are
Hello,
I use R 1.9.1 on Windows 2000. I have a chart that I am looking. I use
identify() and locator() to find out the (x,y) values of interesting points
in the chart, but these functions are not always helpful (e.g., sometimes
identify() prints on top of the chart, making the number illegible).
Hello,
I have a matrix equation, Ax=b, that I need to solve for x. x should be a
vector of positive numbers (between 0 and 1). A is not a square matrix in
general. This lead me to using the SVD. However, using the SVD gives me
positive and negative numbers, as well. I have some constraints
Ripley [mailto:[EMAIL PROTECTED]
Sent: 27 July 2004 10:13
To: Molins, Jordi
Cc: '[EMAIL PROTECTED]'
Subject: Re: [R] SVD with positivity constraints
If A is not square, which dimension is larger? There will most likely be
either no solution or an infinity of solutions. If the latter, I think
you
The sender would like to recall the message, [R] SVD with positivity
constraints.
The information contained herein is confidential and is inte...{{dropped}}
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of d should be set manually to 0. Is
this done (maybe as an option) in svd or in La.svd? could this resetting
have a material effect in the solutions found?
thank you
J
-Original Message-
From: Prof Brian Ripley [mailto:[EMAIL PROTECTED]
Sent: 27 July 2004 10:13
To: Molins, Jordi
Cc
=m2=0, and then m3 being the number of equations I have.
Using the simplex method for linear programing would give me my solution,
or would this method give me a degenerate solution?
thank you, and please bear with me my desesperation ;-
Jordi
-Original Message-
From: Molins, Jordi
Sent
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