Displaying 20 results from an estimated 2100 matches similar to: "newby issue with the date class"
2006 Jun 09
5
Using link_to with an image tag & link text
Hi ,
I was trying to use link_to along with image_tag
to setup a link that would open in an external window.
But I was unable to make a link using both text & an image
So my current workaround looks like this inside a partial
where link is http://foo.com & text would be descriptive
<img src="images/arrow.gif" border="0"/> <%= link_to(text, link,
:popup
2006 Mar 31
6
Calculating Dates
Hello,
I am a complete newbie with Ruby and Rails. I am working on learning it
by writing a project I was going to write in PHP using Rails. I am
having a difficult time finding clear information on how I would do
this.
I need to take a date out of a table in my database and given another
day calculate the next 28 day anniversery of the original date. This is
used to calculate a delivery
2008 Dec 11
3
getting ISO week
Hi all,
Is there a simple function already implemented for getting the ISO
weeks of a Date object?
I couldn't find one, and so wrote my own function to do it, but would
appreciate a pointer to the "default" way. If a function is not yet
implemented, could the code below be of interest to submit to CRAN?
Best Regards,
Gustaf
--------------------
2007 Jan 17
2
problem with unlist POSIX date at midnight
Dear R-users,
I use unlist of POSIX dates to extract the year, hour etc. With that I
can search for files in my database which are in the form
'yyyymmddhh_synops.txt'
However, I get stucked during midnight where unlist just gives NA's.
The script is given below, the problem accurs at acc.period[16]
(midnight). However when I write out the character, unlist works well.
But
2013 Oct 04
2
Possible POSIXlt / wday glitch & bugs.r-project.org status
Wanted to raise two questions:
1. Is bugs.r-project.org down? I haven't been able to reach it for two or three days:
```
ping bugs.r-project.org
PING rbugs.research.att.com (207.140.168.137): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
Request timeout for icmp_seq 3
Request timeout for icmp_seq 4
Request timeout for icmp_seq 5
2010 Oct 01
3
Converting a dataframe column from string to datetime
Hi,
I have a dataframe column of the form
v<-c("Fri Feb 05 20:00:01.43000 2010","Fri Feb 05 20:00:02.274000 2010","Fri Feb 05 20:00:02.274000 2010","Fri Feb 05 20:00:06.34000 2010")
I need to convert this to datetime form. I did the following..
lapply(v,function(x){strptime(x, "%a %b %d %H:%M:%OS %Y")})
This gives me a list that looks like
2003 Aug 13
1
Problems with addition in big POSIX dates
Have you noticed any problems with big dates (>=1/1/2040) in R?
Here is the bit of code that I'm having trouble with:
> test.date <- strptime("1/1/2040",format="%m/%d/%Y")
>
> unlist(test.date)
sec min hour mday mon year wday yday isdst
0 0 0 1 0 140 0 0 0
>
> date.plus.one <- as.POSIXct(test.date) +
2007 Oct 15
3
for loop if else conditional
date <- as.POSIXlt(Sys.time()) #present date
for (i in 1:difftime(as.POSIXlt(Sys.Date()),"2007-10-01"))
if (date$wday != 0 & date$wday != 6) {print(date);assign("date",
(date-86400))} else (assign("date", (date-86400)))
I am trying to print dates from present day to a day in the past, but
omitting weekends. I am not doing something right, but can't
2007 Oct 15
1
String concatenation, File Path Handling to pass to download.file( ) [backslash in DOS paths]
Gabor,
Thanks much. Your solution is elegant. My overall scheme is to take
present date, and check whether it is a weekend, if not, then create a
string based on the date, to concatenate into a url link for
download.file( ). The files I need to download have a part which is in
the format: mmddyy. I am working to make myself a system to connect to
exchanges, and download end of day files from
2011 May 14
2
changing the day of the week in dates format
Dear all,
I have a question related to the POSIXlt function in R.
I have a set of dates and times, for exmaple:
startx <- as.POSIXct("2011-01-01 00:00:00")
finx <- as.POSIXct("2011-12-31 00:00:00")
daysx<- seq(startx, finx, by="24 hours")
I
want to change the dates of all the days falling on a Saturday to the
next working day (i.e. Monday). So I
2008 Nov 11
1
Every other week recurring event
I have the code for computing a weekly event:
(start_date..end_date).select{|d| d.wday == wday}
but I am wondering if anyone has any ideas for using this to figure
out a recurring event for every other week. Is it possible to somehow
specify every other within the .select method? Any other
implementation ideas?
--~--~---------~--~----~------------~-------~--~----~
You received this message
2010 Dec 27
1
Can't merge on datetime?
x = structure(list(date = structure(list(sec = c(0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), min = c(0L, 0L,
0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L,
0L, 0L, 0L), hour = c(0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L,
0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L), mday = c(1L, 2L,
3L, 4L, 5L, 8L, 9L, 10L, 11L, 12L, 15L, 16L, 17L, 18L, 19L, 22L,
23L, 24L,
2005 Oct 06
2
isdst
Can someone, please, explain the difference is results below (notice
the isdst value)
> unlist(as.POSIXlt('2005-7-1'))
sec min hour mday mon year wday yday isdst
0 0 0 1 6 105 5 181 1
> unlist(as.POSIXlt(as.Date('2005-7-1')))
sec min hour mday mon year wday yday isdst
0 0 0 1 6 105 5 181 0
2007 Oct 16
1
try / tryCatch for download.file( ) within a for loop when URL does not exist
I am trying to download a bunch of files from a server, for which I am
using download.file( ) within a for loop. The script is working fine
except until download.file hits a URL which has no file, at which
point it exits. I want to change this behavior to simple log the
failure and maintain state within the for loop and iterate to next. I
read about try / tryCatch but am having trouble
2007 Jan 15
2
Backgroundrb keeps spawning processes
Hi!
I''ve just a created a really simple rails scheduled worker for
backgroundrb to start playing with :
class SessionCleanerWorker < BackgrounDRb::Worker::RailsBase
def do_work(args)
logger.info "SessionCleaner> started"
CGI::Session::ActiveRecordStore::Session.destroy_all( [''updated_at
<?'', 120.minutes.ago] )
2007 Dec 11
3
Wrong length of POSIXt vectors (PR#10507)
Full_Name: Petr Simecek
Version: 2.5.1, 2.6.1
OS: Windows XP
Submission from: (NULL) (195.113.231.2)
Several times I have experienced that a length of a POSIXt vector has not been
computed right.
Example:
tv<-structure(list(sec = c(50, 0, 55, 12, 2, 0, 37, NA, 17, 3, 31
), min = c(1L, 10L, 11L, 15L, 16L, 18L, 18L, NA, 20L, 22L, 22L
), hour = c(12L, 12L, 12L, 12L, 12L, 12L, 12L, NA, 12L,
2007 Dec 17
4
wday not honored in cron trigger
Hey guys,
I was playing with the cron trigger, and I noticed that wday is not
honored. Looking at the code confirms this. Has anyone else seen this?
Thanks
Adam
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2010 Mar 25
4
Creating dataframe of all possible variable combinations
Hello,
I need to create a dataframe containing all possible combinations of three variables: SITE (101,102,103,104), WDAY (MON,TUE,WED,THR,FRI), and TOD (MORN, AFTN). There should be a total of 40 unique combinations in my dataframe. I used expand.grid() successfully(?) to create my dataframe, but then when I went to order it by SITE, the resultant dataframe only contained four rows, one for each
2006 Apr 10
4
Best way to propogate model rules to controller?
Hey everybody,
I''ve got a model that represents kind of a turn-based games. Certain
actions can only be made unders certain conditions. For simplicity,
we''ll say that the only condition for a particular action is that the
weekday be Tuesday.
def add_vote
raise ''You cannot vote today'' unless Date.today.wday == 2
...
end
In my controller I want to show a
2012 Apr 22
2
difficulty in Formatting time series data
Dear R-Gurus
I have a data frame (from CSV file) which has its first column called Date.
The Date is in the format mm/dd/yyyy. I was trying to get the weekday for
these dates and I tried using wday() and day.of.week() functions and both
of them gave me precisely the wrong answers. I think the issue lies in the
proper formatting of dates. The class of this column is a factor class and
hence I