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...e following "2011-05-01 CEST" -"2011-04-01 CEST" I get: "Time difference of 30 days" an thats fine. But when I try "2011-05-01 CEST" - 30 I get nonsense. So how can I subtract some days, month or years from a date? thanking you in anticipation Claudia Paladini

...ata = abarley,groups = ayear, layout = c(1,5) ) it looks totaly different and I get the error message: "x should be numeric in: bwplot.formula(x = ayield ~ avariety | asite, data = list(ayield = c(2," What did I do wrong? Can anybody help me? Best regards, thank you very much Claudia Paladini

Hello, when I convert a factor like this a=01.10.2009 into a date using b=strptime(a, format="%d. %m. %Y"). It works very well. But when I try to convert c = 2009/10 into a date using d=strptime(c, format="%Y/%m") it doesnt work at all. I get d=NA. What did I do wrong? Thank you very much for your help! best regards Claudia

Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on hypatia.math.ethz.ch X-Spam-Status: No, hits=3.5 required=5.0 tests=BAYES_44,RCVD_IN_BL_SPAMCOP_NET autolearn=no version=2.63 X-Spam-Level: *** Dear ladies and gentlmen, I want to import a directory with about 400 files (.dat) in R. I know how to

...mondate's. Here's your example with that package: > library(mondate) > d1 <- mondate("2011-05-01 CEST") > d1 - 1 # subtract one month mondate: timeunits="months" [1] 2011-04-01 Regards, Dan Murphy *Message: 1 *Date: Tue, 30 Oct 2012 11:25:39 +0100 *From: paladini <paladini at beuth-hochschule.de> *To: <r-help at r-project.org> *Subject: [R] subtract a time period from a date* *Message-ID: <da0fe68e813f16a23fae69a3398e0f45 at beuth-hochschule.de> *Content-Type: text/plain; charset=UTF-8; format=flowed* * *Hello everybody, *how can I reduce...

Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Received-SPF: none (hypatia: domain of claudiapaladini at web.de does not designate permitted sender hosts) X-Virus-Scanned: by amavisd-new at stat.math.ethz.ch X-Spam-Checker-Version: SpamAssassin 3.0.1 (2004-10-22) on hypatia.math.ethz.ch X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=BAYES_50 autolearn=no version=3.0.1 Dear ladies a...

Hello! I want to create a plot with x- and y-labels writen in times or arial. How can I change the font? Thank you very much. Best regards Claudia

Hello! I used to save R-Grafics like this: postscript("file.ps"). Is there alsoa way to save them as eps? Thank you very much Claudia

Dear ladies and gentlemen! When I use the plot funtion how can I change the size of the title for the x and y axes (xlab, ylab)and the size of the axes label ? Thank you very much. With best regards Claudia

Hello, I did some nice grafics using plot 3d and scatter3d. Is there a, hopefully not too complicated way, to transform these dynamic, three-dimensional and interactive grafics in a kind of executable file? I want to show and send them via e-mail to projekt partners who don`t use GNU R and who are not used to do programming. So the result should be quite comfortable to execute for them in

...ed with \begin{ document } but is fine with \begin{document} . I think the spaces within the {} must all be removed. Latex does not like spaces John Kane Kingston ON Canada > -----Original Message----- > From: jdnewmil at dcn.davis.ca.us > Sent: Thu, 07 Apr 2016 05:42:57 -0700 > To: paladini at trustindata.de, r-help at r-project.org > Subject: Re: [R] dynamic reports with sweave: error when compiling the > tex-file > > Did you really put spaces between the backslashes and the keywords? That > would be a problem... > -- > Sent from my phone. Please excuse my brevi...

Hello, I want to do a cluster analysis with my data. The problem is, that the variables dont't consist of single value but the entries are pairs of values. That lokks like this: Variable 1: Variable2: Variable3: . . . (1,2) (1,5) (4,2) (7,8) (3,88) (6,5) (4,7) (12,4) (4,4) . . . .

Hello everybody, I've got a problem concerning the function unique. I have got a data.frame "shopdata" with 1000 shop which were evaluated at different points in time. With function subset I chose those shops with more then 10 employee and store it in data.frame "bigshopdata" with 700 shops. bigshopdata=subset(shopdata, shopdata$employee>10) Now I use

Hello! I want to calculate simultaneous confidence intervals for a nominal variable with three categories: "yes", "no", "partially" and I expect that far more than 5 samples fall into each category. I have read that Glaz & Sison's method is only appropriate for variables with 7 or more categories. Therefore, the Goodman method seems like a good idea. I have

Hello, are there fixed threshold values for the changes between different shades of blue in the corrgram? Or is a chang relative depending on the data? I didnt get it in manual. Thank you very much, best regards Claudia

Hello everbody, I want to generate different subsets of my data-set and safe this subsets with names listet in a vector. Because in reality I have got about 70 subsets I want to realize this in a loop Somehow like this: names=c("nam1",

Hello, I took my first steps in dynamic reports with Gnu R and used sweave(). I therefore run Sweave() with an example of Friedrich Leisch, starting like this: \ documentclass [ a4paper ]{ article } \ title { Sweave Example 1} \ author { Friedrich Leisch } \ begin { document } \ maketitle and so on. It worked very well but when I tried to compile the latex file I get this error message: !

Hello everybody, I have got a data set with about 400 companies. Each company has a score for its enviroment comportment between 0 and 100. These companies belong to about 15 different countries. I have e.g. 70 companies from UK and 5 from Luxembourg,- so the data set is pretty unbalanced and I want to do an ANOVA. Somthing like aov(enviromentscore~country). But the aov function is just for

I have a two part question one about statistical theory and the other about implementations in R. Thank you for all help in advance. (1) Am I correct in understanding that Heteroscedasticity is a problem for Generalized Additive Models as it is for standard linear models? I am asking particularly about the GAMs as implemented in the mgcv package. Based upon my online search it seems that some