Displaying 20 results from an estimated 100 matches similar to: "Summing values by weekday and weekend"
2011 Jul 22
1
Summing values by weekday and weekend - based on daily dates
Hi, all
Here I created a data frame like
mydates<- seq(as.Date("2010-05-29"), length = 43, by = "day")
myvalues<-runif(43,0,1)
myframe<-data.frame(dates=mydates, day=weekdays(dates), value=myvalues)
dates day value
1 2010-05-29 Saturday 0.14576143
2 2010-05-30 Sunday 0.37669604
3 2010-05-31 Monday 0.74813943
4 2010-06-01 Tuesday
2011 Jul 22
1
Summing daily values by weekday and weekend
(Sorry for reposting. Please delete previous msgs. Thanks!)
Hi, all
Here I created a data frame like
mydates<- seq(as.Date("2010-05-29"), length = 43, by = "day")
myvalues<-runif(43,0,1)
myframe<-data.frame(dates=mydates, day=weekdays(dates), value=myvalues)
dates day value
1 2010-05-29 Saturday 0.14576143
2 2010-05-30 Sunday 0.37669604
2011 Mar 30
2
summing values by week - based on daily dates - but with some dates missing
Dear everybody,
I have the following challenge. I have a data set with 2 subgroups,
dates (days), and corresponding values (see example code below).
Within each subgroup: I need to aggregate (sum) the values by week -
for weeks that start on a Monday (for example, 2008-12-29 was a
Monday).
I find it difficult because I have missing dates in my data - so that
sometimes I don't even have the
2010 Jul 15
2
How to plot a histogram of weekday frequencies in a list of dates?
Question from an [R] novice...
Hi,
I have a vector of date/times like the one shown below (a truncated
sample of a much longer list...)
> dates[1:4]
[1] "2006-03-16 08:41:00" "2006-03-16 10:28:00" "2006-03-16 11:03:00"
[4] "2006-03-16 11:04:00"
I would like to generate a weekday histogram showing the frequency of
dates falling on each weekday. I know
2011 Aug 24
0
New package ISOweek: Week of the year and weekday according to ISO 8601
ISOweek is a small package which contains functions to substitute the %V and
%u formats which are not implemented on Windows.
In addition, the package offers functions to convert from standard calender
format yyyy-mm-dd to ISO 8601 week format yyyy-Www-d and vice versa.
Uwe Block
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R-packages mailing list
2011 Aug 24
0
New package ISOweek: Week of the year and weekday according to ISO 8601
ISOweek is a small package which contains functions to substitute the %V and
%u formats which are not implemented on Windows.
In addition, the package offers functions to convert from standard calender
format yyyy-mm-dd to ISO 8601 week format yyyy-Www-d and vice versa.
Uwe Block
[[alternative HTML version deleted]]
_______________________________________________
R-packages mailing list
2007 Dec 13
1
counting weekday in a month in R
Hi,
I am trying to count weekday of the month using R. For example, 1/4/2001
is the 4th weekday of Jan, and 1/5/2001 is the 5th weekday of the month, and
1/8/2001 is the 6th weekday of the month, etc. I get as far as extracting
the weekdays from a sequence of dates (see below). But I have not yet
figured out a fast way of counting without using a For Loop. Does anyone
know how to do such counting
2007 Jun 25
0
[1072] trunk/wxruby2/swig/shared/datetime.i: Add typemap for DateTime::WeekDay; plug mem leak with wxDateTime arg
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><meta http-equiv="content-type" content="text/html; charset=utf-8" /><style type="text/css"><!--
#msg dl { border: 1px #006 solid; background: #369; padding:
2006 Jun 23
3
Problems with weekday extraction from zoo objects
Hi Folks!
I'm struggling with dates - but enough about my personal life.....
I have two daily time series files. In one (x) the date format is Y/m/d
and the other (y) is d/m/y. I used read.zoo on both and they read into
R with no problem.
Then I use: weekdays(as.Date(x$DATE)) and get what I expect - all the
days of the week in my data set.
When I use:
2012 Mar 29
1
histogram break width
Hi all,
I am generating histograms with the following R script :
#!/usr/bin/Rscript
out_file = "histo.png"
png(out_file)
scan("values.csv") -> myvalues
hist(myvalues, breaks = 50)
dev.off()
print(paste("Plot was saved in:", getwd()))
I want the histogram to have a larger number of breaks, but a smaller
break width, the idea is to make it appear smoother
2009 Oct 16
1
Frequencies, proportions & cumulative proportions
Dear R-Helpers,
I've looked high and low for a function that provides frequencies,
proportions and cumulative proportions side-by-side. Below is the table
I need. Is there a function that already does it?
Thanks,
Bob
> # Generate some test scores
> myValues <- c(70:95)
> Score <- ( sample( myValues, size=1000, replace=TRUE) )
> head(Score)
[1] 77 71 81 88 83 93
>
>
2011 May 03
0
turning data with start and end date into daily data
Hello!
I have data that contain, among other things the date for the
beginning and for the end of a (daily) time series (see example below
- "mydata")
mystring1<-c("String 1", "String 2")
mystring2<-c("String a", "String b")
starts<-c(as.Date("2011-02-01"),as.Date("2011-03-02"))
2008 Feb 06
1
Histogram/Bar plot graph
Hi,
I have the following data:
> Myvalues
Gene ES MEF Embryo ESHyp
1 GeneA -0.38509507 0.00 1.6250 1.7039921
2 GeneB 0.06262914 0.00 1.6250 -0.272033
and so on...
I want to plot the expression values of GeneA and GeneB in the
different cell/embryo/conditions (columns 2:5 above). Now, if I do:
>library(ggplot2)
> qplot(x=Gene, Embryo, geom =
2006 Mar 21
1
rownames, colnames, and date and time
I noticed something surprising (in R 2.2.1 on WinXP)
According to the documentation, rownames and colnames are character vectors.
Assigning a vector of class POSIXct or POSIXlt as rownames or colnames
therefore is not strictly according to the rules.
In some cases, R performs a reasonable typecast, but in some other cases
where the same typecast also would be possible, it does not.
Assigning a
2006 Mar 21
1
rownames, colnames, and date and time
I noticed something surprising (in R 2.2.1 on WinXP)
According to the documentation, rownames and colnames are character vectors.
Assigning a vector of class POSIXct or POSIXlt as rownames or colnames
therefore is not strictly according to the rules.
In some cases, R performs a reasonable typecast, but in some other cases
where the same typecast also would be possible, it does not.
Assigning a
2006 Jul 03
1
rownames, colnames, and date and time
Hi all
I was wondering whether there has ever been an update on the rownames and
colnames behaviour as described by Eric below?
I still get the same behaviour, exactly as described by Eric, on my WinXP
installation of R-2.3.0. I also posted a message to r-help on Friday but
looking through the online archives it seems to have not made it to the
list. I would agree with Eric that a consistent
2006 Oct 19
3
Schedules for certain weekdays...
Hi
From the documentation I can''t see if I can define the following
schedule:
I want a certain command to be run once a day, monday-friday on a
certain time of the day. Can I define that somehow...?
--
Med venlig hilsen
Juri Rischel Jensen
Fab:IT ApS
Vesterbrogade 50
DK-1620 København
Tlf: 70 202 407 / Fax: 33 313 640
www.fab-it.dk / juri@fab-it.dk
2002 Feb 22
1
Weekdays
Hello,
I'm trying to write a function that returns the number of weekdays between a
vector of start dates and a vector of end dates.
Subtracting the 2 times the number of whole weeks is the easy part and works
if the number of days is a multiple of 7.
However, the number of weekend days in the tail is a little harder. It
depends on both the start date of the tail and the number of days in
2008 Feb 18
2
working with weekdays
Dear all, is it possible create, automatically, a variable with all the
Monday and Thursday?
18/02/2008
21/02/2008
25/02/2008
28/02/2008
03/03/2008
.
.
for all months
Best regards
JL
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Confira v?deos com not?cias do NY Times, gols direto do Lance, videocas[[elided Hotmail spam]]
2012 May 11
1
summary for weekdays()
Hi all,
probably really simple: I seem to be lacking some understanding for the
character class: I have a bunch of dates in a dataframe and I want to add a
string variable with the weekday for each date. If I use something like
mydata$day <- weekdays (mydata$date), I can create subsets for each weekday
(eg mydata=="Monday"), but summary (mydata$day) doesn't count the instances
for