similar to: Excel date to R format

How can I generate a vector of differences between each elemtn of an vector? i.e. a[i]=x[i]/x[i-1] -- View this message in context: http://n4.nabble.com/Deltas-or-changes-tp1585960p1585960.html Sent from the R help mailing list archive at Nabble.com.

This does what I was hoping it would: aggregate(tm[,-1],by=list(tm[,10]),FUN="mean") but I don't know what "tm[,-1]" means (well - the -1 bit anyway. Does it somehow means the whole matrix? Please don't tell me to check the manual - I tried and failed dismally... -- View this message in context: http://n4.nabble.com/tm-1-tp1588804p1588804.html Sent from the R

How do I get a number representing a date from a POSIXct i.e. removing the time elements? -- View this message in context: http://n4.nabble.com/how-to-return-date-part-of-POSIXct-tp1598109p1598109.html Sent from the R help mailing list archive at Nabble.com.

I am parsing dates as follows: > z[1:10,1:3] V1 V2 V3 1 0 03/02/09 22:20:51.274 2 100 03/02/09 22:28:18.801 3 200 03/02/09 22:33:33.762 4 300 03/02/09 22:40:21.826 5 400 03/02/09 22:41:38.361 6 500 03/02/09 22:42:50.882 7 600 03/02/09 22:45:19.885 8 700 03/02/09 22:48:55.558 9 800 03/02/09 22:51:21.112 10 900 03/02/09 22:58:41.860

I have a matrix with a POSIXct as a numeric in the first column. I would like to create a new matrix that is "grouped by" my chosed time bars. i.e. So I would like to group by hour or day or 5 days, and have all my columns be summed or averaged or counted.. mydata: V1,V2,V3 10:03:13,3.4,1002 10:03:14,5.6,1001 10:05:27,7.2,999 10:05:33,8.2,998 I want to convert this into say 5

Hi, A number of people have suggested "I read the manuals"... Could someone help me by telling me where the primary start point is please? For example, I am interested in writing functions with variable number of arguments - where should I start to look? "An introduction to R" only show a brief example - with no pointer to where to find further data. I can't do ?xxx

Does anyone know of a gui for R that has "regions" i.e areas of code in a script that can be named and hopefully run as a section? @region Init library(whatever) myprint<-function(...){print(...)} @endregion -- View this message in context: http://n4.nabble.com/GUI-IDE-tp1745858p1745858.html Sent from the R help mailing list archive at Nabble.com.

Hi folks, I have been tormented for some time by Excel's habit of exporting dates to CSV files as mm/dd/yyyy format even if the dates are formatted dd/mm/yyyy in the display. What's worse, if there are dates that are of ambiguous (6/6/2011) and unambiguous (16/6/2011) format in the same column, Excel reformats the unambiguous dates and leaves the ambiguous ones as they were! Yesterday

>>> Amit Ashara <ashara.amit at gmail.com> schrieb am 12.05.2016 um 17:47 in Nachricht <CAEyg9sgjbsxQY-=VnhQrKiGeTcFSRr1wxOPUhNyCQF8Piuahow at mail.gmail.com>: > Hello Jean-Marc, > > Assuming that a 48KHz, 20ms 8-bit linear PCM data which is 960 bytes is > compressed to 64 bytes (for assumption). The with the Oggs header (4 byte) Actually what I don't

Hello, I am currently taking a statistics course and we are to do a project producing a graph using multiple input files. In R, I'm trying to build a filelist based on a pattern. For some reason, if I do the command interactively and not assign it to an array variable I get what I thought I should, but if I do this inside my R program it chops off some file names and thinks there are two.

I have created a large dataframe (d) by getting data from file using read.table I now have 79 columns and 3 million rows. How can I plot the 6th column? I tried plot(d[,6]) but it doesn't look right. When I try to do just d[,6] the console gets some odd "levels" message I don't understand Moon -- View this message in context:

I have a big data frame and I have extracted a bit by doing: > y<-d[1:10,6] > y [1] Headings 0 -49 -98 -49 -41 -120 -155 -204 -169 92329 Levels: -0 -1 -10 -100 -1000 -10000 -10001 -10002 -10003 -10004 -10005 -10006 -10007 -10008 -10009 -1001 -10010 -10011 -10012 -10013 -10014 -10015 -10016 -10017 -10018 -10019 -1002 -10020 -10021 -10022 -10023

I am having issues with a TDM2400P. It appears when the ZAP channel dials out, it randomly chops the first digit off of the number. I have tried relaxdtmf=yes, turning up and down the txgain, turned off and on the echo cancellation, generated new zaptel (with updated spinlock.h)... I am at a loss. Can someone please offer some help? Thanks. TJ

First of all, I want to say I have been using Samba AD for two years now (since just before 4.0 went stable), and it is an amazing product. We've implemented Active Directory & Group Policy for almost 50 computers and 100 users. Unfortunately, we are now being forced into switching to Windows DCs because Samba does not have an account lockout feature. Citrix (stupidly) does not have

On Mon, Aug 9, 2010 at 11:29 PM, Michael Spencer <bigcheesegs at gmail.com> wrote: > You are right that BoostBook is targeted directly for large C++ > projects, and I seriously considered BoostBook for this project, but > ran into a few road blocks. > > * It's tightly integrated into boost and makes quite a few assumptions > about that. What assumptions is that? On

Hi all, I am really new to dealing with Excel date and time formats to be used in R. I have an Excel exported data matrix in TXT format. One column, labeled DATE, is of the following format examples: 1/8/98 1:00 1/8/98 23:00 to mean that the observation was made on 1st of August 1998 at 1AM and another observation made at 11PM. This is a time series example. How do I read in this column in

To R-helpers, Running R version 2.10.0 (2009-10-26) Linux ... 2.6.25.20-0.5-default #1 SMP 2009-08-14 01:48:11 +0200 x86_64 x86_64 x86_64 GNU/Linux openSUSE 11.0 (X86-64) and having difficulties reading a fifo from within R. A short example that I find simply haning is shown as 'SHORT SCRIPT' below. I expected R to print a data set read from the fifo with the numbers 0,1,...7

R-64 latest Hi. I am trying to plot a set of csv data, which looks like > head(interval) date inteval 1 2012-07-01 00:57:54 +0900 156 2 2012-07-01 01:07:41 +0900 587 3 2012-07-01 01:09:31 +0900 110 4 2012-07-01 01:18:42 +0900 551 5 2012-07-01 01:39:01 +0900 1219 6 2012-07-01 01:40:40 +0900 99 as you can see, more than one event happens each day,

This is Greg's area, he'll be able to answer in detail how the name chopper gets used. IIRC it chops demangled names, so it is indirectly a client of the demangler, but it doesn't use the demangler to do this directly. Name lookup is done by finding all the base name matches, then comparing the context. We don't do a very good job of doing fuzzy full name matches - for instance

Hi all, I have my asterisk setup as following: IP 2 x E1 x-lite <-------> Asterisk -------> PSTN When I place a call from x-lite to PSTN, the quality of the sound in the direction x-lite -> PSTN is very bad. That is, the voice of the x-lite user, heard by the PSTN user is choppy and makes communication not very pleasant. The sound is choppy as if bits of data