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-------------- next part -------------- An embedded message was scrubbed... From: Gildas Mazo <gildas.mazo at curie.fr> Subject: Re: [R] optimization subject to constraints Date: Tue, 10 Aug 2010 15:49:19 +0200 Size: 4924 URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20100810/78862894/attachment.eml>

...(2) aDgt<-spMatrix(ncol=3,nrow=3,i=a1,j=b1,x=c1) png("myImage.png") image(aDgt) dev.off() But this doesn't !!! f<-function(x){ png("myImage.png") image(x) dev.off() } f(aDgt) My image is saved as a text file and contains nothing at all !!! Thanks in advance, Gildas Mazo

Dear R users, Given a user-defined cumulative distribution function F, I want to compute F^{-1}(x). How is that possible with R? Best Regards, -- Gildas Mazo PhD student MISTIS team at INRIA Grenoble, France [[alternative HTML version deleted]]

I there We are making an app using barcode readers and it would be great if we did not have to hit enter or click each time an product is scanned, does anuybody has eny idea about how to achive this? Thanks in advance

Dear R users, I want to aggregate data in the following way: ### X <- data.frame(u = c("T1","T1","T1","T2"), v=c("a","a","b","a")) X library(sqldf) sqlOut <- sqldf("select count(distinct(v)) from X group by u") sqlOut ### Now I want to get the same result without using SQL. How can I achieve that ?

Hi there I have a for with a couple of text_fields. I''m doing some validation via the model and when the validation "works" I get there was an error on blah blah the problem is the form is erased and I have to fill up the form again! I saw that scaffold keeps the form filled when the validation "works" but I dont know exactly what''s making it happen! I would

https://bugs.freedesktop.org/show_bug.cgi?id=92077 Bug ID: 92077 Summary: nouveau graphics freeze when using KDE Plasma 5; PGR engine fault Product: Mesa Version: 10.3 Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component:

https://bugs.freedesktop.org/show_bug.cgi?id=103421 Bug ID: 103421 Summary: Kernel 4.13+ nouveau breaks screen output Product: xorg Version: unspecified Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: Driver/nouveau Assignee: nouveau at

Dear R users, I'd like to build a simple design matrix in a efficient way. I naively wrote the code below. #### n = 15 k = 3 nbPerGrp = c(5,5,5) xT <- list() for (i in 1:k){ xT[[i]] <- rep(0, k) xT[[i]][i] <- 1 } X <- matrix(nrow = n, ncol = k) #design matrix for (i in 1:nbPerGrp[1]){ X[i,] <- xT[[1]] } for (i in 1:k-1){ for (j

Hello All, Want very much to learn how to plot patient drug timelines. Trouble is I need to figure out how to do this today. So not much time for me to struggle with it. Hoping someone can just help me out a bit. Below are some sample data and code that produces what I think is the beginning of a very nice graph. Need to alter the code to: 1. Get the lines for the drugs to appear on the

Dear R users, I'm looking for tools to perform optimization subject to constraints, both linear and non-linear. I don't mind which algorithm may be used, my primary aim is to get something general and easy-to-use to study simples examples. Thanks for helping, Gildas

Hi, I have a data set of points which are represented by 3 variables x,y,z where x is the position of the point on the x-absciss and y on the y-absciss. Each of my points has a value z, which I want to be displayed as follows: the more z is high, the more the color on the map is dark. How can I achieve this ? Thanks for your help -- View this message in context:

Dear R users, I'm using optim to optimize a pretty complicated function. This function takes the parameter vector "theta" and within its body I use instructions like sigma<-theta[a:b]; computations with sigma... out<-c() for (i in 1:d){ a<-theta[(3*d+i):c] out[i]<-evaluation of an expression involving 'a' (I use symbolic differentiation) } Unfortunately

Hi there We arethinking about switching from apache to lighttpd, but we are having problem with the fckeditor... it was working normally in apache and in webrick... but not now, it does not show up I followed the site : http://www.joshuamcharles.com/rails/fckeditor.html So it might be a configuration thing in lighttpd any help is very apreciate it jorge mario

Hi there I''m having problems storing dates in a DB(postgreSQL) I have the field dtmfechanac of type date I have this in the view <%= date_select ''usuario'', ''dtmfechanac'', :start_year => 1900 %> and I have this in te controller data = { "dtmfechanac" => params[:usuario][:dtmfechanac] "dtmfechainicio" =>

HI there how do I tell date_select not to show the dates below Date.today actually Date.today + 14 Thanks in advance --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from

Hi there I bought the rails recipes book, and I implmented the role based auth, but that breaks my auto_complete_for, I added it to the right table , but no luck, any tips would be apreciated Thanks in advance