Displaying 7 results from an estimated 7 matches for "stormer".
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storer
2002 Jun 08
3
contour plot for non-linear models
Hello all,
I've tried to reproduce the contour plot that appears in the book of
Venables and Ripley, at page 255. Is a F-statistic surface and a
confidence region for the regression parameters of a non-linear model.
It uses the stormer data that are in the MASS package.
I haven't been able to reproduce the plot either in R ( version 1.5 )
and S. It makes the axes and it puts the labels, but it doesn't shows
the contour lines.
Could you help me resolving this problem?
This is the code that appears in the book and I...
2004 Oct 16
7
sapply and loop
Dear all,
I am doing 200 times simulation. For each time, I generate a matrix and
define some function on this matrix to get a 6 dimension vector as my
results.
As the loop should be slow, I generate 200 matrice first, and save them into
a list named ma,
then I define zz<-sapply(ma, myfunction)
To my surprise, It almost costs me the same time to get my results if I
directly use a loop
2004 Oct 16
7
sapply and loop
Dear all,
I am doing 200 times simulation. For each time, I generate a matrix and
define some function on this matrix to get a 6 dimension vector as my
results.
As the loop should be slow, I generate 200 matrice first, and save them into
a list named ma,
then I define zz<-sapply(ma, myfunction)
To my surprise, It almost costs me the same time to get my results if I
directly use a loop
2004 Oct 19
0
Question on Rprof(); was: Re: sapply and loop
...gt;>(from
>>> > Venables & Ripley, 1999).
>>>
>>>I believe you parroted that from `Writing R Extensions', but failed to
>>>give proper credit!
>>>
>>> > library(MASS); library(boot); library(nls)
>>> > data(stormer)
>>> > storm.fm <- nls(Time ~ b*Viscosity/(Wt - c), stormer,
>>> > start = c(b=29.401, c=2.2183))
>>> > st <- cbind(stormer, fit=fitted(storm.fm))
>>> > storm.bf <- function(rs, i) {
>>> >...
1999 Mar 25
1
data sets
hi,
I am new to the list, and wonder where can I find the data sets used in
the exercises at the end of the "Notes on R" ...
thanks,
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2012 Aug 14
1
bootstrapped CI for nonlinear models using nlsBoot from nlstools
Hi all
I?m trying to get confidence intervals for parameters from nls modeling. I fitted a nls
model to the following variables:
> x
[1] 2 1 1 5 4 6 13 11 13 101 101 101
> y
[1] 1.281055090 1.563609934 0.001570796 2.291579783 0.841891853
[6] 6.553951324 14.243274230 14.519899320 15.066473610 21.728809880
[11] 18.553054450 23.722637370
The model fitted was:
2003 Apr 09
1
'Apparently' trouble with name spaces and Sweave...
...oad, mcycle,
mdeaths, Melanoma, menarche, michelson, minn38, motors, muscle, newcomb,
nlschools, nottem, npk, npr1, oats, OME, painters, petrol, phones,
Pima.te, Pima.tr, Pima.tr2, quine, Rabbit, road, rock, rotifer, Rubber,
ships, shoes, shrimp, shuttle, Sitka, Sitka89, Skye, snails, SP500,
steam, stormer, survey, synth.te, synth.tr, topo, Traffic, UScereal,
UScrime, VA, waders, whiteside, wtloss
Error in library(MASS) : package/namespace load failed
Error in driver$runcode(drobj, chunk, chunkopts) :
Error in library(MASS) : package/namespace load failed
Error in buildVignettes(dir = "....