hi everybody,
I noticed the following: in one of my scripts 'layout' is used to
generate a (approx. square) grid of variable dimensions (depending on
no. of input files). if the no. of subplots (grid cells) becomes
moderately large (say 9) I use a construct like
###layout grid
Martin Maechler wrote:
joerg == joerg van den hoff [EMAIL PROTECTED]
on Wed, 13 Jul 2005 16:00:58 +0200 writes:
joerg hi everybody,
joerg I noticed the following: in one of my scripts 'layout' is used to
joerg generate a (approx. square) grid of variable dimensions
Chun-Ying Lee wrote:
Dear R users:
I encountered difficulties in michaelis-menten equation. I found
that when I use right model definiens, I got wrong Km vlaue,
and I got right Km value when i use wrong model definiens.
The value of Vd and Vmax are correct in these two models.
I believe the following is correct:
1.
first of all, as peter daalgaard already pointed out, your data Cp(t)
are following a straight line
very closely, i.e. 0.-order kinetics
2.
for your diff. eq. this means that you are permanently in the range cp
Km so that
dCp/dt = - Vm/Vd = const. =: -b and,
Sam Baxter wrote:
Hi
I am trying to set up 16 graphs on one graphics page in R. I have used
the mfrow=c(4,4) command. However I get a lot of white space between
each graph. Does anyone know how I can reduce this?
Thanks
Sam
__
I need to extract identically named columns from several data frames in
a list. the column name is a variable (i.e. not known in advance). the
whole thing occurs within a function body. I'd like to use lapply with a
variable 'select' argument.
example:
tt - function (n) {
x -
is the environment in tt.
On 10/10/05, joerg van den hoff [EMAIL PROTECTED] wrote:
I need to extract identically named columns from several data frames in
a list. the column name is a variable (i.e. not known in advance). the
whole thing occurs within a function body. I'd like to use lapply
Earl F. Glynn wrote:
Berton Gunter [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Or, maybe there's something I don't understand about the
algorithm being used.
Indeed! So before making such comments, why don't you try to learn about
it?
Doug Bates is a pretty smart guy, and
Raphael Fraser wrote:
I am new to R and am looking for a book that can help in learning to
program in R. I have looked at the R website suggested books but I am
still not sure which book best suite my needs. I am interesting in
programming, data manipulation not statistics. Any suggestions?
Thomas Lumley wrote:
On Thu, 24 Aug 2006, Jason Liao wrote:
I recently coded a recursion algorithm in R and ir ran a few days
without returning any result. So I decided to try a simple case of
computing binomial coefficient using recusrive relationship
choose(n,k) = choose(n-1,
S.Q. WEN wrote:
Hi,
I want to get random number which is uniformly distributed on the unit
disc.
How can I do that with R?
Best wishes,
WAN WAN
[[alternative HTML version deleted]]
__
R-help@stat.math.ethz.ch mailing list
I did not find this in the archive (hope it isn't there...):
the current release of R (2.0.1) for MacOS (10.3.6) seems not to handle
german special characters like '' correctly:
f - ''
can be entered at the prompt, but echoing the variable yields
[1] \303\274 (I think the unicode of the
are not currently supported
Solution: do not use an unsupported locale.
On Wed, 15 Dec 2004, joerg van den hoff wrote:
I did not find this in the archive (hope it isn't there...):
the current release of R (2.0.1) for MacOS (10.3.6) seems not to handle
german special characters like '' correctly:
I get two
something like
matplot2(matrix(1:6,3,2),matrix(7:12,3,2),pch=21,bg=c(2,3),type='b')
does not yield the expected (at least by me) result: only the points on
the first line get (successively) background colors for the plotting
symbols, the second line gets no background color at all for its
thanks for the response.
Uwe Ligges wrote:
joerg van den hoff wrote:
something like
matplot2(matrix(1:6,3,2),matrix(7:12,3,2),pch=21,bg=c(2,3),type='b')
Where can we find matplot2?
oops. that should have been 'matplot' (not 'matplot2'), of course.
does not yield the expected (at least by me
Cuichang Zhao wrote:
Hello,
thank you very much for your help in last email. it is very helpful. right now, i have more questions about my project,
1. solve can i remove the NA from a vectors:
for exmample, if my vector is:
v - (NA, 1, 2, 3, 4, 5)
which should read v - c(NA, 1, 2, 3, 4, 5):
Cuichang Zhao wrote:
Hello,
how can use change the plot function to change the range of axises. I want my graph from a certain range [a, b], instead of from the min to max of of datas?
if i want draw a line instead of dots, should i use both plot and lines function.
for example:
plot(x, y);
Hector L. Ayala-del-Rio wrote:
R gurus
I have tried to install the R 2.0.1 binary for OS X and although the
installation was successful I can get the application going. When I
double click the icon R tries to load (R window shows briefly) and it
quits immediately. This behavior was
Drew Balazs wrote:
All,
I'm currently using R 2.0.1 on a Powerbook G4 with OS X 10.3.8. So far
the only way I've found to set my proxy is by doing
Sys.putenv(http_proxy=insert proxy url:proxy port) everytime I
start up R.
This works fine, but I'd like to find a solution that doesnt require
Is there a better way than:
par(mar=c(6,6,6,6))
plot(1:10,yaxt=n,ylab=)
axis(4)
text(12,5.5,'y-label',xpd=T,srt=90)
to get the y-ticks _and_ the y-label to the rhs of the plot? I did not
find anything in the 'par', 'plot', 'axis' and 'title' manpages to
solve the problem. (the above is ugly,
I have written a package, where a function definition includes a regexp
pattern including double backslashes, such as
myfunction - function (pattern = .*\\.txt$)
when I R CMD CHECK the corresponding .Rd file, I get warnings
(code/documentation mismatch), if I enforce two backslashes in the
Sachin J wrote:
Hi,
How can I get the values of mean and median (not only points but values
too) on the boxplot. I am using boxplot function from graphics package.
Following is my data set
df
[1] 5 1 1 0 0 10 38 47 2 5 0 28 5 8 81 21 12 9 1 12 2 4 22 3
Issac Trotts wrote:
On 5/9/06, Prof Brian Ripley [EMAIL PROTECTED] wrote:
On Wed, 10 May 2006, Peter Dalgaard wrote:
Issac Trotts [EMAIL PROTECTED] writes:
I'm on Linux, so it didn't occur to me to look in the Windows FAQ
until it came up in the Google search. Why should Windows users be
Manuel López-Ibáñez wrote:
Jan T. Kim wrote:
That's an idea I like very much too -- much better than the currently
popular idea of protecting users from the unfriendliness of
programming, anyway...
It is just my opinion that the amount of mail in R-help speaks volumes
about the current
Duncan Murdoch wrote:
On 5/16/2006 5:46 AM, Joerg van den Hoff wrote:
Manuel López-Ibáñez wrote:
Jan T. Kim wrote:
That's an idea I like very much too -- much better than the currently
popular idea of protecting users from the unfriendliness of
programming, anyway...
It is just my opinion
karim99.karim wrote:
Dear Sir,
I’am a frensh student and i’am a new user of the R software.
After using the command (x-read.delim(“clipboard”) to read a spreadsheet of
Excel, I want to run the bds test and calculate the Lyapunov exponent. I have
charged the R software by the packages
Marc Schwartz wrote:
On Fri, 2006-05-19 at 16:36 -0700, Betty Gilbert wrote:
Hi,
I'm trying to write a histogram to a pdf
pdf()
plot-hist(c, xlim=c( 0.69, 0.84), ylim=c(0,100))
when I try to open the pdf I can't open it, there is always some
error . Is there something I should add to
Lorenzo Isella wrote:
Dear All,
I may look ridiculous, but I am puzzled at the behavior of the nls with
a fitting I am currently dealing with.
My data are:
x N
1 346.4102 145.428256
2 447.2136 169.530634
3 570.0877 144.081627
4 721.1103 106.363316
5 894.4272
Dan Rabosky wrote:
Hello.
I am creating an R package that I'd like to submit to CRAN (OS Windows
XP). How do I distinguish among 'public' functions, e.g., those that are
intended to be called by users of the package and for which I am providing
documentation examples, and 'private'
ZhanWu Dai wrote:
I am an initial user of R. Could you give me some explanations or examples on
how to solve the first order differential equations by the first-order
Runge-Kutta method?
Thank you very much
Kind regards
Eric Hu wrote:
Hi I am trying to plot two data set in the same picture window without
overlapping with each other. I am using the format plot(x1,y1,x2,y2)
but get the following error message:
plot(as.numeric(r0[,4]),as.numeric(r0[,7]),as.numeric(r0[,4]),as.numeric(r0[,7][ind[,1]]))
Error in
Petr Pikal wrote:
Hi
yes you are correct, I remembered there is something with eval from
older posts but did not find a connection to parse from eval help
page. Shouldn't there be a link? Or even an example?
would be a good thing to do (there only is a link from parse to eval).
after all
Duncan Murdoch wrote:
On 6/19/2006 6:25 AM, (Ted Harding) wrote:
On 19-Jun-06 Rob Campbell wrote:
Hi,
I have to R fairly recently from Matlab, where I have been used to
organising my own custom functions into directories which are adding to
the Matlab search path. This enables me to call
Duncan Murdoch wrote:
Just a few comments below on alternative ways to do the same things:
On 6/19/2006 8:19 AM, Joerg van den Hoff wrote:
for short term usage of some specialized functions I have added some
lines to the `.Rprofile' in my home(!) directory as follows (probably
Duncan Murdoch wrote:
On 6/19/2006 10:19 AM, Joerg van den Hoff wrote:
Duncan Murdoch wrote:
Just a few comments below on alternative ways to do the same things:
On 6/19/2006 8:19 AM, Joerg van den Hoff wrote:
for short term usage of some specialized functions I have added some
lines
hadley wickham wrote:
One of the recurring themes in the recent UserR conference was that
many people find it difficult to find the functions they need for a
particular task. Sandy Weisberg suggested a small idea he would like
to see: a hints function that given an object, lists likely
Jonathan Baron wrote:
On 06/19/06 13:13, Duncan Murdoch wrote:
`help.search' does not allow full text search in the manpages (I can
imagine why (1000 hits...), but without such a thing google, for
instance, would probably not be half as useful as it is, right?) and
there is no sorting by
hadley wickham wrote:
what I really would love to see would be an improved help.search():
on r-devel I found a reference to the /concept tag in .Rd files and the
fact that it is rarely used (again: I was not aware of this :-( ...),
which might serve as keyword container suitable for improving
Davis, Jacob B. wrote:
If object is user defined is:
object$df.residual
the same thing as
df.residual(object)
This is my first time to encounter the $ sign in R, I'm new. I'm
reviewing summary.glm and in most cases it looks as though the $ is
used to extract
directory
3.) transfer this archive to the Windows machine
4.) unzip directly into the desired library destination
this procedure up to now always worked including properly installed
manpages (text + html (and I hope this remains the case in the future...)
joerg van den hoff
Prof Brian Ripley wrote:
On Fri, 23 Jun 2006, Joerg van den Hoff wrote:
just to confirm duncan murdochs remark:
our Windows machines lack proper development environments (mainly
missing perl is the problem for pure R-code packages, I believe?) and we
bypass this (for pure R-code packages
' section in the Rd file reads
=cut==
\usage{
x/y
}
=cut==
which, of course is the desired way to use the function.
what am I doing wrong, i.e. how should I modify the Rd file?
maybe obvious, but not to me.
joerg van den
Prodromos Zanis wrote:
Dear R-projects users
I would like like to ask if there is any way to produce a multipanel plot
with the filled.contour function. In the help information of filled
contour it is said that this function is restricted to a full page
display.
With kind regards
Sara Mouro wrote:
Dear all,
I have been usig R for some time, but now I have a MAC instead of a
PC, am I am having problems in reading files...
I have tried:
Data-read.table(Users/SaraMM/PhD/Analises-LitterBags/Dados-
Litter.txt,head=T)
but it said:
Error in file(file, r) : unable
Prof Brian Ripley wrote:
You are missing eval(parse(text=)). E.g.
x - list(y=list(y1=hello,y2=world),z=list(z1=foo,z2=bar))
(what do you mean by the $ at the start of these lines?)
eval(parse(text=x$y$y1))
[1] hello
However, bear in mind
fortune(parse)
If the answer is parse() you
jim holtman wrote:
?missing
On 7/2/06, Jonathan Greenberg [EMAIL PROTECTED] wrote:
I'm a bit new to writing R functions and I was wondering what the best
practice for having optional variables in a function is, and how to test
for optional and non-optional variables? e.g. if I have the
Stéphane Cruveiller wrote:
Dear R users,
I have a simple question on variable manipulation.
Imagine I have an object OBJ that has toto as one of its variables.
I would like to understand why if I do
varname - toto
OBJ$varname returns no results
whereas
Jim Lemon wrote:
COMTE Guillaume wrote:
Hy all,
I need to draw something in 2 dimension that has 3 dimension, the choice
has been made to use colors to display the third dimension into the
graph.
Has someone done something like that, i can't figure out how to
parametize the
Xu, Xiuli (NIH/NHLBI) [E] wrote:
I would really appreciate it if someone can give suggestions on how to
do spectra fitting in R using ordinary least square fitting and
non-negativity constraints. The lm() function works well for ordinary
least square fitting, but how to specify non-negativity
hi,
did'nt see anything in the archive:
map('world',pro='rectangular',para=0)
yields a strange artifact (horizontal bar) extending over the whole map
at a certain latitude range (approx 65 deg. north), whereas
map('world',pro='rectangular',para=180)
(which should be the same) does not show
before getting scolded for submitting a (non-)bug report:
when using the 'symbols' function for plotting boxplot data (i.e. using
'boxplots' symbols), I noted that the x/y-position of the symbols is
associated with the center of the box.
while this is obviously natural for a usual plotting
Cristina Silva wrote:
Dear all
I have tried to estimate the confidence intervals for predicted values of a
nonlinear model fitted with nls. The function predict gives the predicted
values and the lower and upper limits of the prediction, when the class of
the object is lm or glm. When the object
is there a good way to get the following fragment to work when calling
it as wrapper(1) ?
# cut here==
wrapper - function (choose=0)
{
x - seq(0,2*pi,len=100)
y - sin(1.5*x);
y - rnorm(y,y,.1*max(y))
if (choose==0) {
rm(fifu,pos=1)
fifu - function(w,x)
maybe this qd try helps?
#=cut herer=
vectorplot - function (field) {
#input is a (N x 4 array) of N vectors:
# field[,1:2] - x/y position of vectors
# field[,3:4] - x/y componnent of vectors
# plotted are the 2-D vectors attached to the specified
I apologize for posting this in essence the second time (no light at the
end of the tunnel yet..):
is there a way to enforce that nls takes both, the data *and* the
model definition from the parent environment? the following fragment
shows the problem.
# cut here==
wrapper -
Prof Brian Ripley wrote:
On Thu, 10 Jun 2004, Prof Brian Ripley wrote:
Around R 1.2.x the notion was introduced that variables should be looked
for in the environment of a formula. Functions using model.frame got
converted to do that, but nls did not. I guess that the best way forward
is
Prof Brian Ripley wrote:
No standard R package is supplied as a .rda, including not lme4. You
must be looking at a binary installation, and you would do best to
reinstall from the sources. You could use
R --vanilla
load(/all.rda)
fix(GLMM)
save(ls(all=T), file=/all.rda, compress = TRUE)
Bo Peng wrote:
Dear list,
I need to plot four almost horizontal lines with y-values around
1,3,4, 400. If I plot them directly, the first three lines will be
indiscernible so I am thinking of breaking y-axis into two parts, one
with range (0,5), another (395,400). Is there an easy way to do
luc tardieu wrote:
Hi,
I couldn't find how to have the values written on the
top of each bar in a barplot. When using hist(), it is
possible to use labels=T, but this option does not
seem to exist for barplot().
Is there a trick I could use to do that ?
Thanks to all
Luc
we are running R under Solaris with SunRay Terminals, which are set to 8
bit color to comply with some other software. In this configuration,
X11() opens with colortype=true, i.e., it is not recognized that
actually the display is only 8 bit. This leads to error messages
(advising to use
for some reason the following message seems not to have reached the list
in the first try, at least I can't find it. my apologies if this is my
fault:
we are running R under Solaris with SunRay Terminals, which are set to 8
bit color to comply with some other software. In this configuration,
hi everybody,
is there a canonical way to get hold of the trace=TRUE output from
nls, i.e. to copy it to a R variable (or at least to an external log file)?
I have only found the possibility to fix(nlsModel) (and than the
correct copy of that: namespace function ...) within the R-session by
I posted this a week ago on r-devel but to no avail and hope this not
considered cross-posting:
===cut===
hi everybody,
which each release I hope that the section
weights: an optional numeric vector of (fixed) weights. When present,
is the behaviour
val - ifelse(TRUE, numeric(0), 123)
val #NA
intended or is it a bug, i.e. should an empty object be returned as
might be expected(also in comparsion to what an explicit
val - {if(TRUE) numeric(0) else 123} yields)?
thanks,
joerg
I have encountered the following problem: I need to extract from
a list of lists equally named compenents who happen to be 'one row'
data frames. a trivial example would be:
a - list(list(
df = data.frame(A = 1, B = 2, C = 3)), list(df = data.frame(A = 4,B = 5,C = 6)))
I want the extracted
Serguei Kaniovski wrote:
Hello, how can I get rid of all dimnames so that:
$amat
Var3 Var2 Var1
8 1111 1 1 1 1 0 0 0 0 0 0 0
7 1110 1 0 0 0 1 0 0 0 0 0 0
6 1101 0 1 0 0 0 1 0 0 0 0 0
5 1100 0 0 0 0 0 0 1 0 0 0 0
4 1011 0 0 1
Ben Fairbank wrote:
Hello R users --
If I have a dataframe such as the following, named frame with the
columns intended to be named col1 through col6,
frame
col1 col2 cmlo3 col4 col5 col6
[1,]3 10 2657
[2,]68 4 1071
Sundar Dorai-Raj wrote:
Joerg van den Hoff said the following on 12/14/2006 7:30 AM:
I have encountered the following problem: I need to extract from
a list of lists equally named compenents who happen to be 'one row'
data frames. a trivial example would be:
a - list(list(
df
Robin Hankin wrote:
The following gotcha caught me off-guard just now.
I have two matrices, a and b:
a - matrix(1,3,3)
b - matrix(1,1,1)
(note that both a and b are matrices).
I want them in a list:
B - NULL
B[[1]] - a
B[[2]] - b
B
[[1]]
[,1] [,2] [,3]
[1,]
On Wed, Feb 21, 2007 at 11:09:52AM +, Prof Brian Ripley wrote:
Well, the algorithm used does not affect the confidence interval (provided
it works correctly), but what is nls.ml (presumably in some package you
have not mentioned) and why would I want to use an old-fashioned
algorithm?
On Wed, Feb 21, 2007 at 09:41:29AM -0600, Douglas Bates wrote:
On 2/21/07, joerg van den hoff [EMAIL PROTECTED] wrote:
On Wed, Feb 21, 2007 at 11:09:52AM +, Prof Brian Ripley wrote:
Well, the algorithm used does not affect the confidence interval
(provided
it works correctly), but what
hi,
I have two private packages, the first (`pkc') depending on the second one
(`roiutils'). The source code and DESCRIPTION files describes the dependency
as it should be ('Imports', `require'), at least I think so.
now, running
R CMD CHECK pkc
yields the following output in which I have
On Fri, Feb 23, 2007 at 04:24:54PM -0200, Alberto Monteiro wrote:
Is it possible to create a pdf output file with an (as nearly as
possible) exact size?
For example, if I want to draw in an A4 paper (210 x 297 mm) a
square of 100 x 100 mm, how can I do it?
FWIW, about 6 months ago I
On Tue, Feb 27, 2007 at 03:52:54PM -, Simon Pickett wrote:
Hi,
I have been dabbling with str() to extract values from outputs such as
lmer etc and have found it very helpful sometimes.
but only seem to manage to extract the values when the output is one
simple table, any more
On Thu, Mar 01, 2007 at 10:31:08AM -0700, Jason Barnhart wrote:
Definitely not #2. Prefer #1 but #3 is ok as well.
Definitely not #1. Prefer #2 but #3 is ok as well.
there is nothing like unanimous agreement :-)
but in earnest: I don't think #1 is good on the already mentioned
On Fri, Mar 02, 2007 at 03:42:46PM +0100, Ido M. Tamir wrote:
Hi,
I can get from a string to a function with this name:
f1 - function(x){ mean(x) }
do.call(f1,list{1:4})
get(f1)
etc...
But how do I get from a function to its name?
funcVec - c(f1,median)
funcVec
[[1]]
hi,
second try...
I ran into problems when checking one of my packages with R CMD CHECK:
I have two packages, the first (named `pkc') depending on the second one (named
`roiutils'). The source code and DESCRIPTION files describes the dependency as
it should be, I think ('Imports', `require').
On Wed, Mar 07, 2007 at 05:21:52PM -0700, Rafael Rosolem wrote:
Hi,
I am really new with R, so I don't know anything about it. I have
written a script (attached) which tries to do really basic stuff (such
as computing basic statistics and basic plots). When I try to plot a
histogram and
On Thu, Mar 08, 2007 at 10:11:06AM -, Ted Harding wrote:
On 08-Mar-07 jim holtman wrote:
How do you define a carriage return in the middle of a line
if a carriage return is also used to delimit a line? One of the
things you can do is to use 'count.fields' to determine the
number of
On Fri, Mar 09, 2007 at 01:25:24PM +0100, Lukasz Komsta wrote:
Dear useRs,
I have a curve which is a mixture of Gaussian curves (for example UV
emission or absorption spectrum). Do you have any suggestions how to
implement searching for optimal set of Gaussian peaks to fit the curve?
I
On Thu, Mar 15, 2007 at 10:21:22AM +0100, Peter Dalgaard wrote:
Gavin Simpson wrote:
On Wed, 2007-03-14 at 20:16 -0700, Steven McKinney wrote:
Since you can index a matrix or dataframe with
a matrix of logicals, you can use is.na()
to index all the NA locations and replace them
all
On Mon, Apr 16, 2007 at 09:03:27AM +0200, Martin Maechler wrote:
Yuchen == Yuchen Luo [EMAIL PROTECTED]
on Sun, 15 Apr 2007 12:18:23 -0700 writes:
Yuchen Dear Friends.
Yuchen I tried to use nls.control() to change the 'minFactor' in nls( ),
but it
Yuchen does not seem to
I have a function definition such as
f - function (pattern = .*\\.txt) {}
in the manpage this has to be documented as
f - function (pattern = .*.txt)
in order to get the correct display (with double backslash) in the R console
when issuing `?f', but this causes complains from `R CMD
On Fri, May 04, 2007 at 03:45:10PM -0400, Weiwei Shi wrote:
hi,
is there a way to save a R object into workspace instead of into a
file during a running of function?
if I understand the question correctly you want the 'super-assignment'
operator `-' as in
-cut---
R
(-)').
if some codes as followed have bugs, my f1 function cannot return
anything, which means I have to re-run the time-consuming line again.
you probably should debug it using some dummy data instead of the f2()
call...
thanks,
Weiwei
On 5/4/07, Joerg van den Hoff [EMAIL PROTECTED
On Tue, May 22, 2007 at 01:06:06PM -0400, Chabot Denis wrote:
Thank you Prof. Ripley.
Believe me, I do not have the skills to contribute such a thing as a
stream compressor and I DO appreciate the work and usefulness of the
pdf device as it is. I do most of my plots with pdf device, the
On Wed, May 23, 2007 at 07:24:04AM -0700, Waichler, Scott R wrote:
as you are using MacOS X, you'll have ghostscript installed anyway. so
try in R `dev2bitmap' with `type =pdfwrite'. I believe `gs' _does_
include compression. a quick test showed at least a reduction by about
a factor of 2
://hydrology.pnl.gov
---
-Original Message-
From: Joerg van den Hoff [mailto:[EMAIL PROTECTED]
Sent: Wednesday, May 23, 2007 9:25 AM
To: Waichler, Scott R
Cc: r-help@stat.math.ethz.ch; [EMAIL PROTECTED
On Sun, Aug 12, 2007 at 10:50:59AM -0700, Yuchen Luo wrote:
Dear Professor Murdoch.
Thank you so much
Best Wishes
Yuchen Luo
On 8/12/07, Duncan Murdoch [EMAIL PROTECTED] wrote:
Yuchen Luo wrote:
Dear Colleagues.
I believe this should be a problem encountered by many:
for unweighted fits using `nls' I compute confidence intervals for the
fitted model function by using:
#---
se.fit - sqrt(apply(rr$m$gradient(), 1, function(x) sum(vcov(rr)*outer(x,x
luconf - yfit + outer(se.fit, qnorm(c(probex, 1 - probex)))
#---
where `rr'
dear list members,
I apologize in advance for posting a second time, but probably after one
week chances are, the first try went down the sink..
my question concerns computation of confidence intervals in nonlinear fits
with `nls' when weigthing the fit. the seemingly correct procedure does not
On Wed, Sep 05, 2007 at 04:43:19PM -0700, Yuchen Luo wrote:
Dear friends.
I use nls() and encounter the following puzzling problem:
I have a function f(a,b,c,x), I have a data vector of x and a vectory y of
realized value of f.
Case1
I tried to estimate c with (a=0.3,
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