<[EMAIL PROTECTED]> on 18-11-2005 07:19:24
To:"'Christian Mora'" <[EMAIL PROTECTED]>, Spencer Graves
<[EMAIL PROTECTED]>
cc:r-help@stat.math.ethz.ch
Subject:RE: [R] nlme questions
Warning: non-expert thoughts to follow.
When passing an
0:19:32
To: Christian Mora <[EMAIL PROTECTED]>
cc:r-help@stat.math.ethz.ch
Subject:Re: [R] nlme questions
Both your questions seem too vague to me. You might get more useful
replies if you provide a simple example in a few lines of R code that a
reader could copy from your email i
like that, but I would like to have a different opinion on these
two issues.
Thanks in advance
Christian Mora
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t;Error: Object "convIter" not
found". This error occurs only with R 2.1.1. Any ideas?
Thanks
Christian Mora
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Dear list members;
Is there any trick to extract the coefficients along with std errors,
t-values and p-values for each beta from a gnls fit model (similar to the
results obtained using summary(lm)$coeff for linear models)?
Thanks for any hint
cm
__
R
Hi all;
I'm trying to fit a reparameterization of the
assymptotic regression model as that shown in
Ratkowsky (1990) page 96.
Y~y1+(((y2-y1)*(1-((y2-y3)/(y3-y1))^(2*(X-x1)/(x2-x1/(1-((y2-y3)/(y3-y1))^2))
where y1,y2,y3 are expected-values for X=x1, X=x2, and
X=average(x1,x2), respectively.
Hi Ian
Have you tried help.search("pca")?
Christian
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Martínez Ovando
Juan Carlos
Sent: Tuesday, October 12, 2004 7:56 PM
To: Ian Fiske
Cc: [EMAIL PROTECTED]
Subject: RE: [R] covariate selection?
Hello Ian,
Hi all;
Im working with two datasets in R, say data1 and data2. Both datasets
are composed of several rows and columns (dataframe) and some of the
rows are identical in both datasets. Im wondering if there is any way to
remove from one set, say data1, the rows that are identical in the other
set, s
A fairly good tutorial is Gráficos Estadísticos con R by Juan Carlos
Correa and Nelfi González (PDF [2110kB]) that you can find in
Documentation/Contributed (in Spanish though).
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Phil
Sent: Wednesday, June
Working on the same idea, Ive generated a data grid with 4 vars, two of
them with its own sequence and two with fixed values. As Spencer pointed
out one option is to get the values from a simple loop. My question is:
How can jump from one set of starting values to the next (on the data
grid) in cas
How can I get the mode (most frequent value) from a dataset (continuos
variables)? I can obtain it when the data is discrete (by making a table
and looking at the higher frequency) but I don't know how obtain it
from, for example, a density plot of the data. Does anyone know how to
do it? Thanks
CM
Hi all;
I'm working with the library SuppDists trying to fit a Johnson's Sb
distribution to a dataset. It works fine, but I need to set one of the
location parameters (epsilon) to zero. How can I do this using the
function JohnsonFit() or any other similar? ...and Is it possible to
define the type
YourData[sample(209,106),]
Regards
Christian Mora
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Savano
Sent: Monday, December 01, 2003 9:38 AM
To: Lista R
Subject: [R] Sampling
UseRs,
I imported a table using "read.table". It has 209 ob
Hi all,
I'm working with a dataset from 10 treatments, each
treatment with 30 subjects, each subject measured 5
times. The plot of the dataset suggests that a
3-parameter logistic could be a reasonable function to
describe the data. When I try to fit the model using
gnls I got the message 'Step ha
Hi all,
I'm working with a dataset from 10 treatments, each
treatment with 30 subjects, each subject measured 5
times. The plot of the dataset suggests that a
3-parameter logistic could be a reasonable function to
describe the data. When I try to fit the model using
gnls I got the message 'Step ha
Hi all,
Ive got a database with 10 columns (different
variables) for 100 subjects, each column with
different # of NA's. I'd like to know if it is
possible to use a function to exclude the NA's using
only a specific column, lets say:
Data2 <- omit.exclude(Data1$column1) ??, then
Data3 <- omit.exc
Dear all,
I'm working with grouped data using the nlme package
in R. By using the function plot() I'm trying to
obtain a trellis-like graph but by default a legend is
placed on top of the plot. How can I remove this
legend?
Thanks for any hint
Chri
Dear R users
I'm a new user of R and I have a basic question about the 4-parameter
logistic model. According to the information from Pinheiro & Bates the model
is:
y(x)=theta1+(theta2-theta1)/(1+exp((theta3-x)/theta4)) ==
y(x)=A+(B-A)/(1+exp((xmid-input)/scal))
from the graph in page 518 of the
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