Hi all,
There is a NISTnls package with the nonlinear regression examples in CRAN.
This work might have been done already.
regards,
Jesus
On Fri, July 14, 2006 10:57 am, Sean O'Riordain said:
Please don't shoot!
q: would it be a good idea to use these datasets as a basis for some
Dear R-helpers,
I need some help to produce a set of contour plots that I am
trying to make in order to compare surfaces between the levels of a
factor. For example:
library(lattice)
g - expand.grid(x = 60:100, y = 1:25, ti = c(a,b,c))
g$z -with(g,
(-1e-4*x-1e-3*y-1e-5*x*y)*(ti==a) +
Hi Mike,
*An example of the use of aov() for a split-plot is in MASS
library(MASS)
example(Oats)
The book also gives a detailed explanation
*pp 45-52 of the Pinheiro and Bates book gives you an example of the
use of
lme() on a split-plot. If you have a non balanced
Hi Robert
You can try gnls() in the nlme package or if that is not suitable, try
to
follow the example in the nls() help page for weighted regression that has
an example of weighted regression from MASS.
from the nls help page:
## weighted nonlinear regression
Treated -
Dear R-helpers,
Could somebody provide an example of the use of the L term in the
anova.lme() function to test linear combinations of different terms in a lme
model?. Is it possible to make more than one test in a single call to
anova.lme()?.
best regards,
Jesus
--
-Original Message-
From: Jason Turner [mailto:[EMAIL PROTECTED]
Sent: 26 May 2004 22:11
To: Jesus Frias
Subject: RE: [R] Metafiiles into Word R 1.9.0
There is one more thing that might shed some light (or not)
on it: I have
just found that I can actually copy-paste a plot
Dear R-helpers,
I recently upgraded to R 1.9.0 in my computer at work and at home:
1.-The computer at home has Windows XP and Office XP and it seems to work
perfectly and I copy-paste graphics perfectly.
2.-The computer at work has Microsoft Windows 2000 (5.00.2195
Dear R-helpers,
I would like to change the default value of a functions that is call by a
package. The function deparse() is called by a set of functions from a
library and because I don't think is appropriate to change the library, I am
trying to change the default value in deparse().
Dear R-helpers,
I am trying to reshape a data frame that is in a wide format into a long
format one. I have come across the reshape() function, but I have been very
successful using it.
As an example:
ll -
data.frame(time.1=seq(0.1,1,length=10),L1=rnorm(10),time.2=c(seq(1,7),rep(NA
Hi,
Quote:
The Savitzky-Golay smoothing turns out to be exactly equivalent to fitting
data to a polynomial as described (Skoog, Holler and Nieman, Principles of
Instrumental Analysis, pp 111)
While R is not a tool for instrumental analysis, I am sure you can find
Now, I am including Richar Upton's 2 cm model implementation and
Christoffer Tornoe's nls solution (I recommend Christoffer's
nlmeODE package for these problems also if multi-response data is
available) The code follows:
Multi-response data?, Is there a way of dealing with those
Hiya
I'd like to get only A as output...
two solutions:
1.-use unique()
unique(tempdata$TYPE)
to get your answer
2.-or call factor again to reduce the levels:
tmpd - subset(myd,clas==A)
levels(tmpd$clas)
[1] A B C
tmpd$clas - factor(tmpd$clas)
levels(tmpd$clas)
[1] A
regards,
Hi Christian,
I suppose that you are doing this in a loop and is stopping.
Have a look at the function try()
?try
Try an Expression Allowing Error Recovery.
Description:
`try' is a wrapper to run an expression that might fail and allow
the user's code to handle
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