similar to: slicing and dicing timestamps by month, week, day, etc

I''ve been playing around with some easier ways of specifying conditions in active record, and have come up with a little plugin that some may find useful. Currently active record finder and calculations methods can take a :conditions option with a string or array listing some sql conditions, eg: Animals.find :first, :conditions => "name = ''Tiger''" My

Dear R Help, I am trying to get fields showing the last day of each month for a monthly closing project. In order to find the last day of the previous month, I subtract the number of days from the current month. For all months my code works; however, for October, my code doesn't work...it returns 2010-09-*29* instead of 2010-09-*30*. format(strptime("2010-10-31",

Hi, I would be very grateful for some advice. I have read the help pages for Date, strptime, etc. All examples seem to use some version of day month year as date format. However I have Weekly composite data so ONLY want to input the dates as Week.Year (eg 35.2011). strptime seems to show this is possible using %W for week (UK convention) and %Y for year. My data is in a df called chlorophyll and

I have weekly time series data with year, month, day, and price variables. The input data set for the weekly series takes the following form: Year month day price 1990 8 20 119.1 1990 8 27 124.5 1990 9 3 124.2 1990 9 10 125.2 1990 9 17 126.6 1990 9 24 127.2 1990 10 1 132.1 1990 10 8 133.3 1990 10 15 133.9 1990 10 22 134.5 1990 10 29 133.9 .. ... ... ... ... ... .... .... 2008 3 3 313.7 2008

I have a xts object made of daily closing prices I have acquired using quantmod. Here is my code: library(xts) library(quantmod) library(lubridate) # Gets SPY data getSymbols("SPY") # Subset Prices to just closing price SP500 <- Cl(SPY) # Show day of the week for each date using 2-6 for monday-friday SP500wd <- wday(SP500) # Add Price and days of week together

Dear all, given a daily time series data, I am able to calculate monthly average, quarterly average like:   library(zoo) dat <- zooreg(rnorm(500), start=as.Date("2000-01-01"), frequency=1) mo.ave <- aggregate(dat, as.yearmon(index(dat)), "mean") head(dat) head(mo.ave) However is there any direct way like above to calculate the weekly average, bi-monthly average?   Thanks

hi, im having a table which holds a lot of information. i would like to slice & dice in a BI-manner the table. u guys have any suggestions? table looks a bit like this: user app [appa, appb, appc] action [actiona, actionb, actionc] timestamps ... so it would be cool to sort, drill in&up based on the various dimensions. im not asking for a full bi-solution, but maybe the one or the other

Dear R users: I have a data set that looks something like this: ID time y 1 2/01/2008 4 1 2/09/2008 12 1 9/01/2008 8 2 1/06/2008 3 2 3/01/2008 4 2 3/09/2008 9 2 6/03/2008 4 3 1/02/2008 3 3 1/10/2008 8 3 2/02/2008 7 3 2/10/2008 3 I'd like to sum up the weekly data to the monthly level, so that it looks something

Dear Gabor, Thanks for your reply. however: > tail(DJd) ^DJI.Close 2010-04-01 10927.07 2010-04-05 10973.55 2010-04-06 10969.99 2010-04-07 10897.52 2010-04-08 10927.07 *2010-04-09 10997.35* > tail(ag) 2009-11-30 10344.84 2009-12-31 10428.05 2010-01-31 10067.33 2010-02-28 10325.26 2010-03-31 10856.63 *2010-04-30 10997.35 * It seems the script "makes up"

Dear all, FrontPage currently mentions a bi-weekly newsletter. This should be changed to "monthly". Regards, Timothy Lee

Dear Jin, I've talked with Vikram, and we agree that having this code (and a dynamic backwards slicing pass that Swarup and I wrote) in a publicly available SVN repository is a good thing. I'll try to get you a copy of the static slicing code some time next week (I should be able to work on it Monday morning) so that you can start working with it right away. I can work on making a

Dear all, Is anyone aware of any implementation of an inter procedural slicing algorithm for LLVM? I am mostly interested in a static algorithm but a dynamic one can be helpful too. Thanks, Silviu Ganceanu Research Student, Ecole Polytechique Federale de Luasanne -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi All, Are there any known implementations of static inter-procedural slicing for LLVM (especially forward slicing)? I did find a few references to it in the archives dating back to 2008, but am not sure what the current status is. Any pointers would be highly appreciated. Thanks Rohit Grad Student Middleware Security and Testing Group http://cs.wisc.edu/mist University of Wisconsin-Madison

Hello John et al - I have been struggling to implement static backwards slicing with LLVM. After digging llvmdev postings for some time, I see that other people were having similar difficulties and John's got almost complete code that may be shared. May I get a copy of it, too? Better yet, it would be helpful for many other people if the code were checked in to an example directory or

We have done a few class projects on static interprocedural slicing but they are all of "course project" quality. I will put you in touch with some of the students who did those, if you're interested? --Vikram Associate Professor, Computer Science University of Illinois at Urbana-Champaign http://llvm.org/~vadve On Aug 15, 2008, at 8:48 AM, Silviu-Ionut Ganceanu wrote:

Hi all, This is a GSoC 2013 proposal for LLVM project. Please see the formatted version at here: http://pacman.cs.tsinghua.edu.cn/~liuml07/files/gsoc2013-proposal-program-slicing.pdf Program slicing has been used in many applications, the criteria of which is a pair of statement and variables. I would like to write an inter-procedural program slicing pass in LLVM, which is able to calculate C

Hi all, I've been trying to work out how to slice an array of arbitrary dimension. I found a message showing how to stick two arrays together, but so far have been unable to transform that into what I need. Assume that I have a four dimensional array for example: array4d , , 1, 1 [,1] [,2] [1,] 3 6 [2,] 1 1 , , 2, 1 [,1] [,2] [1,] 4 7 [2,] 8 7 , , 1, 2

Hi all... I am developing a program slicing framework using LLVM. The idea is to remove the computation parts from the program and only keep the parts relevant for the control flow. For example, in the following C loop. for (i=0;i<=VAL;) { printf("In the loop"); a=b+c; b=h+k; i++; printf("%d",i); } after slicing... for (i=0;i<=VAL;) { i++;

I'm designing a language that supports array slicing. Does LLVM allows conversions between array pointers? For example, can I cast a pointer-to-array-of-5-ints to a pointer-to-array-of-3-ints? Can I get the address of the third element of an array-of-5-ints and convert it to a pointer-to-array-of-3-ints? Then again, I suppose a pointer-to-int would work just as well since LLVM

On 6/26/12 5:07 PM, amruth.rd wrote: > Hello, > > I am curious to know if LLVM offers any passes to do interprocedural slicing, I need to eliminate most of the computations(possibly all, if they don't influence the control flow), but the control flow of the program should be maintained at all cost. I did see an optimization pass to print the CFG of a function without its body to a