Re: [R] pls. help -Logisitic Regression-Urgent

2p4333433.html > Sent from the R help mailing list archive at Nabble.com. > > __ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-gui

Re: [R] constrOptim and further arguments

input further arguments in this manner, any help from the list would be gratefully received. Regards Mike Griffiths On Tue, Dec 20, 2011 at 11:53 AM, Michael Griffiths < griffi...@upstreamsystems.com> wrote: > Dear List, > > I am using constrOptim to solve the following > >

[R] constrOptim and problem with derivative

ould help, I would be most grateful. Regards Mike Griffiths -- *Michael Griffiths, Ph.D *Statistician *Upstream Systems* 8th Floor Portland House Bressenden Place SW1E 5BH <http://www.google.com/url?q=http%3A%2F%2Fwww.upstreamsystems.com%2F&sa=D&sntz=1&usg=AFrqEzfKYfaAalqvahwrpywpJD

[R] None-linear equality constrained optimisation problems

blems finding the solution in R. Can the community suggest another method by which this might be solved? As ever, many thanks for your time. Mike Griffiths -- *Michael Griffiths, Ph.D *Statistician *Upstream Systems* 8th Floor Portland House Bressenden Place SW1E 5BH <http://www.google.c

Re: [R] Regular expressions in R

## > > gsub("\\s\\+\\s[[:alnum:]]*\\s\\*\\s[[:alnum:]]*", "", form1) > [1] "product + CTA + help" > > gsub("\\+[[:alnum:]]*\\*[[:alnum:]]*", "", form2) > [1] "product+CTA+help" > > > > ## your code (using gsub() inst

[R] Regular expressions in R

t;, form) I am obviously still not understanding something. If the list could offer some guidance I would be most grateful. Regards Mike Griffiths -- *Michael Griffiths, Ph.D *Statistician *Upstream Systems* 8th Floor Portland House Bressenden Place SW1E 5BH <http://www.google.com/url?

Re: [R] Help with text separation

Sentence*LEGAL+' from form. Can this be accomplished in the same manner? Many thanks, once again, for your help Mike Griffiths On Mon, Nov 14, 2011 at 12:09 PM, Sarah Goslee wrote: > Hi, > > On Mon, Nov 14, 2011 at 4:20 AM, Michael Griffiths > wrote: > > Good mor

[R] Help with text separation

in a certain format. All variables and maths operators require a space between them in order for strsplit to work in the manner I require. I would very much like to accomplish what the above code already does, but without the need for the initial character string having the need for the aforemention

Re: [R] General help - online statistics courses?

elp > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- *Michael Griffiths, Ph.D *Statistician *Upstream Systems *23 Old Bond Street, London, W1S 4PZ Mob +44 750 011 2873 DL

Re: [R] OptFederov and Dopt.design

Dear R users, I have used the AlgDesign package to construct a D-optimal exp. design from a file containing a set of allowed runs. The code for the optFederov call is below: #Using optFederov -- library(AlgDesign) options(contrasts=c("contr.sum","contr.poly")) f