search for: begindive

Hello, I recently set up a rails application, and wanted to provide helper methods in my model class. I was confused that the class DOESN''T refer to its fields as instance variables. I merely had to type in the field names to be able to work with their data. Here''s an example: I have a "Chessgame" class with a begindate and an enddate. To get the number of hours

I am having trouble with creating a POSIXct object. If I create a variable of class Date first out of the date part of my data, I am ok, but if I just paste the date and time parts together and try and create the POSIXct object, I have problems. Here is a toy example created from the actual data which caused the problem. I am using R 2.0.1 on Windows XP. > # Data frame with dates and

i have time series of momentum signal. I want to get the date of each of the "-1" signal period. for example , the first period of -1 signal begins on 2005-9-21 and ends on 2005-9-28. 2nd period of -1 signal begins on 2005-09-30 and ends on 2005-10-28. Thx Cameron date Px 200MA Signals 2005-09-15 26.27 25.83865 1 2005-09-16 26.07 25.83275 1

hi all, I'm working on scrapping some website data to build a database. Under most cases, I can use package XML to get the dataset. However, some of the website doesn't give a explicit address of the downloaded tables. To be more specific, for example, I'm interested in the website http://ets.aeso.ca/ The data we are scraping is the "Pool Weekly Summary" under the

Sorry of I'm going over old ground ... We are in the process of putting in a Suse Linux OpenExchange Server (SLOX) which at present includes Samba 2.2.5*. We are also attempting to use this as a PDC for XP clients that we are going to be rolling out. Now, everything seems to be going down the pan, and it looks like the problem is that XP has dropped support for 'old style'

...s between the start and end of the dives. But there is, I have checked. I reckoned that it has to do with the format of the datetime values. I couldnt find how to convert it to a numeric value. At the moment my datetime values are in a POSIXct format defined as follows as.POSIXct(strptime((dive$begindive),'%Y/%m/%d %H:%M:%S'),tz="GMT") I have also tried to sort the tdr data first in ascending order tdr <- tdr[order(tdr$datetime),] #sort z according to dtime I have even tried to convert to numeric format in excell (all three datetime values) and then use those numerics in R bu...