similar to: debug in a loop

Hello, I created a data.frame which contains two columns: df$P (Power) et df$DateTime (time). I'd like to add a new column df$diffP (difference of Power between T and T-2). I made a loop : for (i in 3:length(df$DateTime)){ df$diffP[i] = df$P[i] - df$P[i-2] } execution time result is unaceptable: 24s !! Is there any way to reduce complexity about O(n) ? for example 2 or 3s (10s maxi)

Hi, I have to debug my program. When I execute my function (in debug mode), I have got an error but I do not know which line is concerned. I do not want to do an infinite "Browse[2]>n with each line in my function... THanks for your help, ikuzar -- View this message in context: http://r.789695.n4.nabble.com/basic-debugging-tp4371113p4371113.html Sent from the R help mailing list

Hello, I'd like to know how to plot several curves in the same frame (1curve = 1line=1day). For instance (csv file): 2012-02-01 01:00:00; 2100 2012-02-01 02:00:00; 2200 ... 2012-02-01 23:00:00; 2500 2012-02-02 01:00:00; 1000 2012-02-02 02:00:00; 1500 ... 2012-02-02 23:00:00; 1700 Here, I have to plot 2 curves in the same frame: 1 for 2012-02-01 (on the first line) and 1 for 2012-02-02 (on

Hi, Does anybody know why get I this kind of strange situation: Browse[2]> hcEnd [1] "2009-03-29 06:30:00" Browse[2]> class(hcEnd) [1] "POSIXlt" "POSIXt" Browse[2]> is.na(hcEnd) [1] TRUE This issue is the source of my all issues in my program, Thanks for your help -- View this message in context:

Hi, I 'd like to know how to retrieve a column name of a data frame. For instance : df = data.frame(c1=c('a','b'),c2=c(1,2)) > df c1 c2 1 a 1 2 b 2 I would like to retrieve the column name which value is 2 (here, the column is c2) thanks for your help -- View this message in context:

Hello, RStudio displays errors in french . I'd like to change it in english Please help, Thanks -- View this message in context: http://r.789695.n4.nabble.com/RStudio-how-to-change-language-from-fr-french-to-eng-english-tp4424972p4424972.html Sent from the R help mailing list archive at Nabble.com.

Hi everybody, I want to use macro in my R code. But defmacro was not in my libraries. So I installed it : > install.packages("gtools") Installing package(s) into ?C:/Program Files/R/R-2.13.2/library? (as ?lib? is unspecified) essai de l'URL 'http://cran.cict.fr/bin/windows/contrib/2.13/gtools_2.6.2.zip' Content type 'application/zip' length 102500 bytes (100 Kb)

Hello, I 'd like to use some functions in myLib. So I do: library(myLib) Then I get this message: Error: package 'myLib' is not installed for 'arch=i386' > sessionInfo() R version 2.13.2 (2011-09-30) Platform: i386-pc-mingw32/i386 (32-bit) locale: [1] LC_COLLATE=French_France.1252 LC_CTYPE=French_France.1252 LC_MONETARY=French_France.1252 LC_NUMERIC=C

Hi, I'd like to know if there is an equivalent for #ifdef (Clangage) in R. I 'd like to do something like: useDebug = defmacro(DEBUG, expr=(DEBUG==1)) if(useDebug(0)){ #Here I do not use debug mode make_addition = function(a, b) { c=a+b plot(c) return(c) } }else{ #here I use debug mode c=a+b } I assume this would work... The problem is : if

Hi, I'd like to plot a point: plot(1,2) I use RStudio. I'd like to know how to specify the length of Oy axis. I 'd like to put 20 as length of Oy but , by default, I 've got 2.5. Thanks for your help -- View this message in context: http://r.789695.n4.nabble.com/how-to-specify-the-Oy-axis-length-tp4372937p4372937.html Sent from the R help mailing list archive at Nabble.com.

Hi, I 'd like to know how to extract an interval of "hour:minute" type from a column of POSIXlt POSIXct type. For instance: my_data.csv: 4352;2011-09-02 21:30:00;3242; 4352;2011-09-02 21:31:00;3315; 4352;2011-09-02 21:32:00;4241; 4352;2011-09-02 21:33:00;5394; ... 4352;2011-09-02 01:02:00;67; 4352;2011-09-02 01:03:00;67; 4352;2011-09-02 01:04:00;67; .... I loaded

Hello, I'd like to classify data with kmeans algorithm. In my case, I should get 2 clusters in output. Here is my data colCandInd colCandMed 1 82 2950.5 2 83 1831.5 3 1192 2899.0 4 1193 2103.5 The first cluster is the two first lines the 2nd cluster is the two last lines Here is the code: x = colCandList$colCandInd y = colCandList$colCandMed m = matrix(c(x, y),

Hello, I have got a data frame df like this : > df e1 e2 e3 e4 1 1 11 1 21 2 2 12 2 22 3 3 13 3 23 4 4 14 4 24 5 5 15 5 25 6 6 16 6 26 7 7 17 7 27 8 8 18 8 28 9 9 19 9 29 10 10 20 10 30 where e1 ... e3 are vectors I have to select columns which median is in the interval [5;6] ( Here, for instance, e1 and e3) I would not want to use loop... (for, while) I search

Hello I'am using Samba 4.2.3 in CentOS 7.2.1511 (distro release) with openLdap integration as standalone file server. Everything works good, but when I want to use Windows extended ACLs (right click on folder -> Properities, Security tab), translation of SIDs to real group names is going realy slow. Mentioned problem occours only when I add security permissions for groups, user SIDs are

Hi, I'am quite new in Free BSd, and I'am trying to install the port net/portfwd, but I'am getting an error msg. Does anybody can help me? I'am using this version FreeBSD 4.8-STABLE #7: Tue Aug 12 21:46:52 BRT 2003 MSG: && CONFIG_FILES=getopt/Makefile CONFIG_HEADERS= /bin/sh ./config.status creating getopt/Makefile gmake[2]: Leaving directory

Hello, I want to understand how to tell if a model is significant. For example I have vectX1 and vectY1. I seek first what model is best suited for my vectors and then I want to know if my result is significant. I'am doing like this: model1 <- lm(vectY1 ~ vectX1, data= d), model2 <- nls(vectY1 ~ a*(1-exp(-vectX1/b)) + c, data= d, start = list(a=1, b=3, c=0)) aic1 <- AIC(model1)

Hey All, I'am using pxelinux to try and boot a 200meg uncompressed (approx 50 compressed) ramdisk onto a machine with 512meg of ram. It looks as though I'am running out of memory (attempt to access beyond end of device error). Is there a limit on what we put for ramdisk_size? Or Is there other limitations? thanks -- Jeff Geddes, BSc(UNB) Computer Systems Specialist University of

Hello.. i'am a new member here. I'am interested in using wine.. does wine compatible with centos 4.3 i386 and x86_64.. what the deferences between wine and cross over... ? Thank You Cahyo ________________________________________________________ Kunjungi halaman depan Yahoo! Indonesia yang baru! http://id.yahoo.com/ -------------- next part -------------- An HTML attachment was

Hey all, I'am able to use pxelinux to successfully boot a particular kernel and image on various IBM PC's ex. 6287-41U and 6591-34U. However, using the same setup (ie. dhcp, tftp, pxelinux.0, pxelinux.cfg, networkcard, bootrom, ram memory) on an IBM 6282-73U my kernel and image decompress fine but I'am getting a... Kernel Panic: VFS: Unable to mount root fs on 01:01 I realize

Currently I'am using samba for file sharing. My smb.conf file is basically setup as default with a few minor changes. Therefore, my samba server is not part of a domain. Right now users can map the samba shares with windows XP... With this type of setup is it possible for them to change there smbpasswd using ctrl-alt-del? If so any examples or hints on how to set this up would be great.