Re: another density question

2000-08-04 Thread Monica
We have the function density of z that requests. You needs it? so that he is going it to use? Sorry my english. Monica Gautam Sethi wrote: > hi folks: > here's another density question. > > x ~ U(a,b) > y ~ U(c,d) > > where 0 < a < c < b < d. what is density of > > 1. z

Re: Non-linear curve fitting to time series

2000-08-04 Thread Petr Kuzmic
Charles Paxton wrote: > [...] I > have a curve of cumulative number of species over time (i.e. time, years in > fact on x). For theoretical reasons I want to fit a two parameter > rectangular hyperbola of the form Y=(A*X)/(B+X) where A and B are > constants. [...] > The problem is that as I see

Re: Non-linear curve fitting to time series

2000-08-04 Thread Donald Burrill
On Fri, 4 Aug 2000, Charles Paxton wrote: > I have a curve of cumulative number of species over time (i.e. time, > years in fact on x). For theoretical reasons I want to fit a two > parameter rectangular hyperbola of the form Y=(A*X)/(B+X) where A and > B are constants. ... > The problem as

Re: ensuring confidentiality (fwd)

2000-08-04 Thread Peter Lewycky
Well, the whole point is that individuals will put in 4 letters followed by 6 numerals which may or may not correspond to mother's maiden name or her birthdate. But I don't care other than they put a code that they can remember. If one were to suggest that they put in their own unique code, more t

Non-linear curve fitting to time series

2000-08-04 Thread Charles Paxton
Hi My apologies for sending this if the answer is trivial (I am a biologist who plays with statistics) a reference to a good text book would be useful. I have a curve of cumulative number of species over time (i.e. time, years in fact on x). For theoretical reasons I want to fit a two parameter r

nonlinear regression

2000-08-04 Thread Robert J Tamburo
I previously posted a problem of mine regarding nonlinear regression with the levenberg-marquardt method described in the numerical recipes in c book. I was informed that this was a sloppy implementation of the method and not very robust for nonlinear regression. I received good feedback from the

Re: S-plus

2000-08-04 Thread Chuck Cleland
Shawn Way wrote: > I'm fairly new to using this app, so please bear with me. I've got > two sets of data with overlapping x axis and I'm trying to plot them > > a) on the same graph and > b) one using lines, the second using bars > > the data is xy data. Any ideas? Shawn: Have you explored

Re: ensuring confidentiality (fwd)

2000-08-04 Thread dennis roberts
At 09:59 AM 8/4/00 -0400, Bob Hayden wrote: >- Forwarded message from Peter Lewycky - > >I've yet to meet an (adult) respondent who did not know his mother's >maiden name and her birthdate. :) > >- End of forwarded message from Peter Lewycky - > >We must meet sometime!-) can i co

S-plus

2000-08-04 Thread Shawn Way
I'm fairly new to using this app, so please bear with me. I've got two sets of data with overlapping x axis and I'm trying to plot them a) on the same graph and b) one using lines, the second using bars the data is xy data. Any ideas? =

Re: ensuring confidentiality (fwd)

2000-08-04 Thread Bob Hayden
- Forwarded message from Peter Lewycky - I've yet to meet an (adult) respondent who did not know his mother's maiden name and her birthdate. :) - End of forwarded message from Peter Lewycky - We must meet sometime!-) _ | |Robert W. Hayden