Displaying 20 results from an estimated 2000 matches similar to: "Week number from a date"
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
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2011 Nov 30
3
how to call a function for each row
Hi
I have a data-frame which look like this
X1 X2 X3
1 3 5
2 4 6
3 6 1
I want to apply a formula Y=6*X1 + 7*X2 + 8*X3 for every row
Thanks in Advance
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2012 Nov 26
3
Help in splitting the records
Hi
I have set of records seperated by a separator say "$$$" i want to get the
values in a dataframe.
eq
qwer$$12$$qwre
ewrtr$7789$ewwe
I want the output as\
V1 V2 V3
qwer 12 qwre
ewrtr 7789 ewwwe
Please help me
-----
Thanks in Advance
Arun
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2011 Sep 19
2
Setting the Values
Hi
I have a variable str = " X", "Y" and values ("0","12")
i want to set value for X =0 and Y =12 and use inside the program.
how to do this
Please anybody help me.
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2012 Apr 03
2
Histogram classwise
Hi
I have a data class wise. I want to create a histogram class wise without
using for loop as it takes a long time
my data looks like this
x class
27 1
93 3
65 5
1 2
69 5
2 1
92 4
49 5
55 4
46 1
51 3
100 4
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Thanks in Advance
Arun
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2012 Jul 17
2
comparing three vectors
Hi
I 've a data
a=c(10,20,30)
b=c(100,200,300)
c=c(50,60,70)
I want to compare a[1]<=c[1]<b[1],......
How to compare for all the records
-----
Thanks in Advance
Arun
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2012 Apr 24
2
searchina a pattern in a string
I have a long string. i want to sepearate a 10 digit phone no from it.
eg
"my no is 9876543210 is personal no and my official no is 123-456-8907. you
can use any of these"
i want to seperate the 9876543210 and 123-456-8907 from this. therev may be
many phone nos in the string. how to do it
-----
Thanks in Advance
Arun
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2011 Feb 09
1
Iterate over a list of input files?
Hi,
I've got the following code which seems to work fine for a single
file if I specify the file name explicitly in the code. What I need to
do is run it on all the files in the directory tested and augment the
data frame I'm building to have more results columns.How can I do
that?
Here's the code:
library(chron) # .Holidays / is.holiday / is.weekend
TStoDate = function
2012 Oct 24
3
Results not dispalying in R console
Hi
I'm not getting any results in R console when i run commands. I reinstalled
R but the results are same
-----
Thanks in Advance
Arun
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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
2008 Feb 27
2
All Day Events
I must be stupid because this cannot be this hard.
I''m trying to build an all day calendar event. In most clients it shows up as an entry at the top of the day rather than blocking out the whole day with an event.
I have a bit of code that looks like this...
cal.event do
dtstart DateTime.parse("#{startDate.year()}-#{startDate.month()}-#{startDate.day()}")
dtend
2012 Jan 09
6
runif with condition
Hi
I want to generate 4 random number which sum up to 100 always
Please help
-----
Thanks in Advance
Arun
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2006 Apr 25
1
Array of dates/times from time.now till nextweek
Hi,
I would like to make @dates in my controller.
I tried the following:
startdate = Time.now
enddate = startdate.next_week
for enddate > startdate
@dates << startdate
startdate = startdate.tomorrow
end
But I get an errormessage when I check the syntax:
"warning: useless use of a variable in void context"
Anyone?
Thanks!
Steven.
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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,
2011 Nov 16
3
changing date format in a dataframe
Hi
I have a data frame and i need to change the date format in it.
my dataframe
X Date
1 1/1/2009
2 2/1/2009
3 3/1/2009
I need to change it to 2009-01-01
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2012 Feb 22
3
inserting a dataframe into the table
Hi,
I have a dataset
X Y
A= 10 15
20 30
40 50
B = X Z
10 30
20 50
I have a table containing X Y Z columns
How to insert a data frame into the table without using for loop ?
now currently i'm using the for loop with using the insert command?
-----
Thanks in Advance
Arun
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2012 Jul 03
2
read the date format
hi
I have a data like thursday, November 20,2012. I'm not able to convert
into data format in R
Can anyone please help
-----
Thanks in Advance
Arun
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2012 Aug 03
1
how to get a date variable from a dataset
Hi
I have a find the class of each variable of the data set which is given as
input. I can able to find the string and the numeric variable. Not able to
find if the variable is date or not
Can any one help me.
-----
Thanks in Advance
Arun
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2011 Nov 17
2
Adding a year to existing date
Hi
I need to add an year to and date field in the dataframe.
Please help me
X Date
1 2008-01-01
2 2008-02-01
3 2003-03-01
Thanks in advance
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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",