similar to: Array of dates/times from time.now till nextweek

Displaying 20 results from an estimated 1000 matches similar to: "Array of dates/times from time.now till nextweek"

2009 Feb 22
6
CHECK if param exists? please help
hi folks. i want to check if a param exists if not to set it to a default value for my date range filter. in my controller i have: @from_date = Date.strptime(params[:startdate],"%d/%m/%Y") @to_date = Date.strptime(params[:enddate],"%d/%m/%Y") @articles = @results.find(:all, :conditions => [ "created_at >= ? and created_at
2006 Feb 08
6
can''t get date_select to work
Hi, I render a couple of date_select fields, the HTML looks fine, I can see the values submitted back to the server, but AR doesn''t pick them up from the hash in Booking.new(params[''booking'']). I''ve got a ''booking'' object with parameters product, startdate and enddate. HTML snippets: <select
2006 Jul 26
8
change text_field_tag class
in my booking / _form I have the following input fields : (startdate and endate) <div> <label for="startdate">Booking Start Date</label><br /> <%= text_field_tag(''startdate'', @startdate, {:class => @startdateclass, :readonly => "readonly", :maxlength => "25"} ) %> <%= observe_field("startdate",
2012 Nov 02
2
Date format conversion from "2012-09-20" to "2012:09:20"
Hi R, How to get the range of values form startDate to lastDate as given below?. #***************************************************************** # Load historical data #****************************************************************** library('quantmod') endDate =Sys.Date() startDate = as.Date(endDate-30, order="ymd") dataspy = getSymbols("SPY", from = startDate,
2008 Nov 19
2
Exclude holidays in a subset of dates?
Hi All, I am iterating through dated materials, with variable start and end dates, and would like to skip procedures everytime I encounter a weekend or holiday. To do this, I thought the easiest way would be to create a TRUE/FALSE vector corresponding to each day where it is TRUE if a workday, and FALSE if a weekend or holiday. So far I have been able to do this for weekdays: startDate <-
2006 Mar 01
3
Convert Date to Time
Hi, How do i convert a Date to a Time?? I have a date returned from sql and i need to be able to use handy functions like next_week or beggining of week. Any help appreciated Thanks, Chris -- Posted via http://www.ruby-forum.com/.
2006 Feb 06
4
Basic MVC in RoR question
Ok, Here''s my controller: def create trainingplan = Trainingplan.createplan(@params[:startdate], @params[:enddate], @params[:hoursperweek], @params[:programtype]) end My model is: class Trainingplan <ActiveRecord::Base def self.createplan(stardate, enddate, hoursperweek, programtype) stardate = startdate enddate = enddate hoursperweek = hoursperweek programtype
2011 Mar 23
1
using R variables in RMySQL query
I have the following function myGetstockdataMySQL <- function(startdate, enddate, ticker) { con <- dbConnect(MySQL(), user="blahblah", password="blahblah", dbname="blahblah", host="localhost") rs <- dbGetQuery(con, "SELECT price.close FROM price INNER JOIN stocks ON stocks.stock_id=price.stock_ID WHERE (price.date_holding BETWEEN
2005 Jun 01
2
problem with chron scales in lattice
I can't get the scales parameter in xyplot of lattice to work as I expected. I'm using R-2.1.0 and lattice 0.11-8. There should be year labels from 1992 to 2004 for the x axis in the plot below, but instead only a few of them appear, and in the wrong spots, as if the coordinate system has changed after finishing with the panel function. library(chron) library(lattice) # vertical grid
2007 Apr 03
2
Strange labels on plot with dates
Hello fellow R people, I don't understand the default behavior of the axis labeling when plotting dates. I would expect something like 2001, 2002 or possibly Jan 01, Jan 02...Jan 06, but instead I only see Jan 01, Jan 01, Jan 01.... See the following example startdate <- strptime("2001-01-01",format="%Y-%m-%d") enddate <-
2010 Aug 29
1
calculations with dates
Hi, I have a data.frame with factors in columns like startdate enddate 27SEP2005 01JAN2006 How can I calculate the duration between those two dates and move this in a extra column in the data.frame. Thanks, André [[alternative HTML version deleted]]
2012 Apr 09
1
Creating a dummy variable
HI I want to create a dummy variable for a dataset which has various dates Eg I've one year data. The user can choose any date range startdate : 2012-01-01 enddate: 2012-02-01 startdate: 2012-06-01 enddate=2012-07-01 the columns of dataset= X ,Y ,date Thanks and re ----- Thanks in Advance Arun -- View this message in context:
2006 May 16
1
:conditions on has_one realationship
Hi there, I''m currently building a membership application and I want to be able to select, not just all the memberships, but the most current membership from the database on a per user basis. I have linked the tables as shown:- class Membership < ActiveRecord::Base belongs_to :payment belongs_to :person end class Person < ActiveRecord::Base has_many :memberships
2012 Jul 11
2
Passing Multiple Variable Into SQLDF Statement as parameters of function
Hey guys, So I'm working with a project where I manage a database within R, and I'm developing a script/function that will automatically run my queries in R depending on the date parameters passed in. The problem is that when I create variables for the dates, and use those variables in my sqldf statements, R says that there is no such column in the dataframe (which is true!). My question
2012 Aug 01
4
how to calculate seasonal mean for temperatures
Hello everybody, I need to calculate seasonal means with temperature data for my work. I have 70 files coming from weather stations, which looks like this for example: startdate <- as.POSIXct("01/01/2006", format = "%d/%m/%Y") enddate <- as.POSIXct("05/01/2006", format = "%d/%m/%Y") date <- seq(from = startdate, to = enddate, by =
2017 Dec 18
0
Finding center of mass in a hydrologic time series
Hi Eric, the following works for me. HTH, Eric library(EGRET) StartDate <- "1990-10-01" EndDate <- "2017-09-30" siteNumber <- "10310000" QParameterCd <- "00060" Daily <- readNWISDaily(siteNumber, QParameterCd, StartDate, EndDate) # Define 'center of mass' function com <- function(x) { match(TRUE, cumsum(x/sum(x)) > 0.5) -
2017 Dec 18
2
Finding center of mass in a hydrologic time series
Eric B's response provided just the kind of quick & simple solution I was hoping for (appears as the function com below). However, I once again failed to take advantage of the power of R and have reverted back to using a for loop for the next step of the processing. The example below (which requires the library EGRET for pulling an example dataset) works, but probably can be replaced
2017 Jul 30
4
Kalman filter for a time series
I found an example at http://www.bearcave.com/finance/random_r_hacks/kalman_smooth.html shown below. But it seems the structSSM function has been removed from KFAS library so it won't run. Does anyone know how to fix the code so that it runs? library(KFAS) library(tseries) library(timeSeries) library(zoo) library(quantmod) getDailyPrices = function( tickerSym, startDate, endDate ) {
2011 Jan 29
1
Basic Help with Zoo objects and trading days
All, I have been just recently working with zoo objects for trading systems. Can someone please help with these basic questions? Given a daily time series downloaded using get.hist.quote() from the tseries package, ie...... startDate= as.Date("2000-01-01") endDate= as.Date("2011-01-29") frequency= 'd' s= get.hist.quote('IWF', start= startDate, end=
2017 Oct 15
2
Download data from NASA for multiple locations - RCurl
Dear all, i am trying to download time-series climatic data from GES DISC (NASA) Hydrology Data Rods web-service. Unfortunately, no wget method is available. Five parameters are needed for data retrieval: variable, location, startDate, endDate, and type. For example: ###