[R] Richiesta informazioni
Sono Andrea Nesi, studente di Ingegneria dellUniversità di Firenze. Sto facendo il tirocinio nellUfficio di Protezione Civile del Comune di Prato, dove sto cercando di effettuare una statistica sui dati idrometrici rilevati, relativi ad una serie storica di 12 anni (per ogni anno è in mio possesso un file txt di valori idrometrici delle letture ogni 15 minuti). Scopo del lavoro è quello di verificare le altezze relative ad una portata con tempo di ritorno biennale e quinquennale (che già esistono ma appaiono sottostimate) in ottemperanza della c.d. legge Bertolaso. Per questo lavoro ho deciso di utilizzare il software R, ma le mie conoscenze del programma sono, in pratica, nulle. E da un po di tempo che lavoro alla manipolazione dei dati in mio possesso, ma anche utilizzando le dispense che ho trovato non riesco a giungere ad una soluzione definitiva del problema. Non avendo purtroppo nessuno che mi possa dare aiuto sul programma, ho pensato di chiedere a lei se può fornirmi dei riferimenti riguardo testi che possano essere utili al mio lavoro, o qualsiasi altra informazione (comandi, lavori già effettuati sul tema, etc.) attinente il mio studio in R, se lei ne conosce qualcuna. Ringraziandola molto per la disponibilità, se mi può rispondere le sarei molto grato. Andrea Nesi __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
RE: [R] vector
If you have all your vectors in a list vl - list( p1, p2, p3) the the following should do the trick: res - numeric(0) for( i in 1:length(vl) ) res - c( res, vl[[i]] ) Bendix Carstensen -- Bendix Carstensen Senior Statistician Steno Diabetes Center Niels Steensens Vej 2 DK-2820 Gentofte Denmark tel: +45 44 43 87 38 mob: +45 30 75 87 38 fax: +45 44 43 07 06 [EMAIL PROTECTED] www.biostat.ku.dk/~bxc -- -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Frederic renaud Sent: Monday, December 27, 2004 1:57 AM To: r-help@stat.math.ethz.ch Subject: [R] vector Hi! Can you help me? I would like to make a vector from p pre-determined vector. The parameter p can change. I've try with ?c with unsuccess! An idee? Sorry for my english! Thanks Fred __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] vector
BXC (Bendix Carstensen) [EMAIL PROTECTED] writes: If you have all your vectors in a list vl - list( p1, p2, p3) the the following should do the trick: res - numeric(0) for( i in 1:length(vl) ) res - c( res, vl[[i]] ) Or, do.call(c, vl) -- O__ Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] vector
On Mon, Dec 27, 2004 at 11:09:13AM +0100, BXC (Bendix Carstensen) wrote: If you have all your vectors in a list vl - list( p1, p2, p3) the the following should do the trick: res - numeric(0) for( i in 1:length(vl) ) res - c( res, vl[[i]] ) or, shorter, and faster I would guess, res - unlist(v1) Bendix Carstensen -- Bendix Carstensen Senior Statistician Steno Diabetes Center Niels Steensens Vej 2 DK-2820 Gentofte Denmark tel: +45 44 43 87 38 mob: +45 30 75 87 38 fax: +45 44 43 07 06 [EMAIL PROTECTED] www.biostat.ku.dk/~bxc -- -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Frederic renaud Sent: Monday, December 27, 2004 1:57 AM To: r-help@stat.math.ethz.ch Subject: [R] vector Hi! Can you help me? I would like to make a vector from p pre-determined vector. The parameter p can change. I've try with ?c with unsuccess! An idee? Sorry for my english! Thanks Fred __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html -- Göran Broströmtel: +46 90 786 5223 Department of Statistics fax: +46 90 786 6614 Umeå University http://www.stat.umu.se/egna/gb/ SE-90187 Umeå, Sweden e-mail: [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] list(0) to integer
On Mon, 27 Dec 2004 03:18:53 -0800 (PST)
Frederic renaud [EMAIL PROTECTED] wrote:
Hello
I've another question :-)
I would like to transform a list to a integer.
I must be sure that the number entered by the user is
an integer! Thus, I've made :
repeat{
cat(Effectif des populations (integer):)
n-scan(,n=1,what=list(0),quiet=TRUE)
if (is.integer(n[[1]])==TRUE) break
print(L'effectif des population doit etre un
entier)
}
if (!is.integer(unlist(n))) stop(L'effectif ...)
You don't need `== TRUE' (and I guess you meant `== FALSE')
An error action can be executed using stop(some error message).
`break' breaks out of the loop (ie goes to the first statement
after the loop), so the print statement cannot be executed.
Are you sure you need n to be a list ?
HTH,
Tobias
That doesn't work of course but I've no idea to do
this. How verify that n[[1]] is an integer an
transform them as an integer (as.integer(n) doesn't
work!)
Someone can help me? Thanks!
Fred
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[R] email lists
I need to get this to everyone possible...how? www.geocities.com/dollbottgreen This is totally legit...don't want to break any laws. Don't want to and can't wait weeks and months before search engines pick it up. [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] classification using logistic regression
Dear Colleagues, I would like to do classification using logistic regression. Which R package can I use? Also is there any package for feature selection for logistic regression based method? Thanks a lot in advance. Happy holidays. Regards, Raj [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] how to ignore t.test error message
Hi Although t.test does not give an error with t.test(c(0, 0), c(0, 0)); if you try doing that with any number other than 0, t.test(c(1,1),c(1,1)) (R gives the following error) Error in t.test.default(c(1, 1), c(1, 1)) : data are essentially constant The logic in insisting is that my data has different columns, and I'd like to tolerate if in one of the columns, the data fail to pass the t.test. Thanks Burak --- Uwe Ligges [EMAIL PROTECTED] wrote: burak kutlu wrote: Hello, I was wondering if there is a way to ignore the error message you get when some of the data means you compare are constant in some lines of your data frame. What does the error message say exactly? Do you have an example? Even with the degenerated case t.test(c(0, 0), c(0, 0)) I don't get any error message. I'd like to go ahead with t.test See ?try and get the calculated p-values anyway in such a case. And what is the p-value in such a case? I guess I haven't understood the problem correctly, so please be more specific! Uwe Ligges Thanks -burak __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
RE: [R] how to ignore t.test error message
See ?try (as Uwe said) or ?tryCatch. Andy From: burak kutlu Hi Although t.test does not give an error with t.test(c(0, 0), c(0, 0)); if you try doing that with any number other than 0, t.test(c(1,1),c(1,1)) (R gives the following error) Error in t.test.default(c(1, 1), c(1, 1)) : data are essentially constant The logic in insisting is that my data has different columns, and I'd like to tolerate if in one of the columns, the data fail to pass the t.test. Thanks Burak --- Uwe Ligges [EMAIL PROTECTED] wrote: burak kutlu wrote: Hello, I was wondering if there is a way to ignore the error message you get when some of the data means you compare are constant in some lines of your data frame. What does the error message say exactly? Do you have an example? Even with the degenerated case t.test(c(0, 0), c(0, 0)) I don't get any error message. I'd like to go ahead with t.test See ?try and get the calculated p-values anyway in such a case. And what is the p-value in such a case? I guess I haven't understood the problem correctly, so please be more specific! Uwe Ligges Thanks -burak __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] classification using logistic regression
Hi, On Mon, 27 Dec 2004, Rajdeep Das wrote: I would like to do classification using logistic regression. Which R package can I use? Have you tried glm() function? Also is there any package for feature selection for logistic regression based method? Do you mean model selection methods like forward selection? If so, try step() HTH, Kevin Ko-Kang Kevin Wang PhD Student Centre for Mathematics and its Applications Building 27, Room 1004 Mathematical Sciences Institute (MSI) Australian National University Canberra, ACT 0200 Australia Homepage: http://wwwmaths.anu.edu.au/~wangk/ Ph (W): +61-2-6125-2431 Ph (H): +61-2-6125-7407 Ph (M): +61-40-451-8301 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] RandomFields: Controling seed with GaussRF
Hi, I'm using RF to simulate a correlated variable with GaussRF set.seed=1 GaussRF(sim.kfinegrid, grid=F, model=exponential, param=c(0,0.5,0,0.2)) However when I simulate again using the same random seed I get different results. set.seed=1 summary(GaussRF(sim.kfinegrid, grid=F, model=exponential, param=c(0,0.5,0,0.2))) Min. 1st Qu. MedianMean 3rd Qu.Max. -2.3110 -0.9726 -0.3831 -0.3048 0.2378 2.0100 set.seed=1 summary(GaussRF(sim.kfinegrid, grid=F, model=exponential, param=c(0,0.5,0,0.2))) Min. 1st Qu. Median Mean 3rd Qu. Max. -1.83400 -0.33260 0.10340 0.06004 0.47310 1.68300 How can I control the seed with GaussRF ? Regards EJ __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] random numbers within a given range
Dear Colleagues, Is there a way to get random numbers within a given range? Regards and thanks in advance, Raj [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] RandomFields: Controling seed with GaussRF
Ernesto Jardim [EMAIL PROTECTED] writes: set.seed=1 GaussRF(sim.kfinegrid, grid=F, model=exponential, param=c(0,0.5,0,0.2)) However when I simulate again using the same random seed I get different results. set.seed=1 summary(GaussRF(sim.kfinegrid, grid=F, model=exponential, How can I control the seed with GaussRF ? Surely not by assigning values to set.seed - it is a function! Look at ?set.seed and pay attention to the Usage: section. -- O__ Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] RandomFields: Controling seed with GaussRF
On Tue, 2004-12-28 at 00:30, Peter Dalgaard wrote: Ernesto Jardim [EMAIL PROTECTED] writes: set.seed=1 GaussRF(sim.kfinegrid, grid=F, model=exponential, param=c(0,0.5,0,0.2)) However when I simulate again using the same random seed I get different results. set.seed=1 summary(GaussRF(sim.kfinegrid, grid=F, model=exponential, How can I control the seed with GaussRF ? Surely not by assigning values to set.seed - it is a function! Look at ?set.seed and pay attention to the Usage: section. You're correct ! Sorry. It's a problem of the interface between the computer and the chair :) EJ __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] random numbers within a given range
Rajdeep Das [EMAIL PROTECTED] writes: Is there a way to get random numbers within a given range? Yes. What distribution? If uniform, see help(Uniform). -- O__ Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] plots
Is there a way to save plots and use in a word document. Thanks for your help in advance. durai __ Send holiday email and support a worthy cause. Do good. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
RE: [R] plots
Yes. Assuming you are using R in Windows, right click on the plot, and choose Save as metafile, or more expeditiously, Copy as metafile, and then paste directly into your WORD document. Charles Annis, P.E. [EMAIL PROTECTED] phone: 561-352-9699 eFax: 614-455-3265 http://www.StatisticalEngineering.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of duraikannan sundaramoorthi Sent: Monday, December 27, 2004 8:00 PM To: r-help@stat.math.ethz.ch Subject: [R] plots Is there a way to save plots and use in a word document. Thanks for your help in advance. durai __ Send holiday email and support a worthy cause. Do good. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Question about creating error bars
On Thu, 23 Dec 2004, Dan Bolser wrote:
I have data that looks (very roughly) like this...
Declarative:
Several 'groups', each group with a very variable number of
data points associated.
Procedural:
v.1 - c(rep(50,1), rep(5,5), rep(2,10)) # Set up
v.2 - c('a','b','c','d','e','f','g','h', # the
'i','j','k','l','m','n','o','p') # groups
v.3 - rep(v.2,v.1) # here.
v.4 - rnorm(length(v.3)) # Simulate data.
v.5 - tapply(v.4,v.3,mean) # My analysis.
plot(v.5)
As the number of data points in a group gets smaller, so the variance of
the mean value for that group goes up. I would like to bootstrap some
error bars to show roughly how variable the value for each group is. Here
we have a normal distribution, but mostly my data is binary (i.e. each
group has a different number of (nearly) binary observations). The groups
are ordered, and I want to see any trend in my data accross the groups.
Dan.
Nothing I can do to help pal, sorry.
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RE: [R] plots
For exact contol of height and width, you may want to have a look at: ?win.metafile Bendix Carstensen -- Bendix Carstensen Senior Statistician Steno Diabetes Center Niels Steensens Vej 2 DK-2820 Gentofte Denmark tel: +45 44 43 87 38 mob: +45 30 75 87 38 fax: +45 44 43 07 06 [EMAIL PROTECTED] www.biostat.ku.dk/~bxc -- -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of duraikannan sundaramoorthi Sent: Tuesday, December 28, 2004 2:00 AM To: r-help@stat.math.ethz.ch Subject: [R] plots Is there a way to save plots and use in a word document. Thanks for your help in advance. durai __ Send holiday email and support a worthy cause. Do good. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
