Displaying 5 results from an estimated 5 matches for "ssk2031".
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sc92031
2006 Sep 28
1
Nonlinear fitting - reparametrization help
...rrors with nls, even with very different starting
values, and have not yet figured out how to interpret the trace results
usefully.
Can someone help ? Is there a correct parameterization for this problem ?
I have appended some R code with sample data to fit.
Thank you !!!
Suresh; please cc ssk2031 at columbia.edu if possible.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
x=seq(-10,10,length=1000)
a0=0;
ae=1;
me=0;
se=1;
ai=0.5;
mi=0;
si=3;
dogy <- function(x,a0,ae,me,se,ai,mi,si){
y=a0+ae*exp(-0.5*(((x-me)/se)^2))-ai*exp(-0.5*(((x-mi)/si)^2))
y}
y=do...
2005 Feb 12
2
comparing predicted sequence A'(t) to observed sequence A(t)
Hi,
I have a question that I have not been succesful in finding a definitive
answer to; and I was hoping someone here could give me some pointers to
the right place in the literature.
A. We have 4 sets of data, A(t), B(t), C(t), and D(t). Each of these
consists of a series of counts obtained in sequential time-intervals: so
for example, A(t) would be something like:
Count A(t): 25,
2007 Nov 23
0
R users in Cyprus
...o/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained,
> reproducible code.
>
------------------------------
Message: 78
Date: Wed, 21 Nov 2007 22:16:09 -0500
From: "Suresh Krishna" <ssk2031 at columbia.edu>
Subject: Re: [R] R and reading matlab compressed files
To: r-help at r-project.org
Message-ID: <op.t16bc7qvcrygw3 at xyz-fk9zmm6y5kd>
Content-Type: text/plain; format=flowed; delsp=yes;
charset=iso-8859-15
One possibility is to save in ASCII format from Matlab (save...
2007 Jul 31
0
R on QNX
Hi,
Has anyone attempted to compile R on QNX 4.x or 6.x ? It would be
particularly cool if there is a precompiled version somewhere on the QNX
software archives.
Thank you very much !!
Suresh
ps. Please cc replies to my address if possible...
2005 Mar 31
1
Contingency table: logistic regression
Hi,
I am analyzing a data set with greater than 1000 independent cases
(collected in an unrestricted manner), where each case has 3 variables
associated with it: one, a factor variable with 0/1 levels (called XX),
another factor variable with 8 levels (X) and a third response variable
with two levels (Y: 0/1). I am trying to see if X1 has an effect on the
relationship between X2 and the