search for: weeks

...<-data.frame(week=seq(as.Date("2010-04-01"), as.Date("2011-12-26"),by="week")) week # each week starts on a Monday I also have a vector of dates I am interested in, e.g.: july4<-as.Date(c("2010-07-04","2011-07-04")) I would like to flag the weeks in my weekly$week that contain those 2 individual dates. I can only think of a very clumsy way of doing it: myrows<-c(which(weekly$week==weekly$week[weekly$week>july4[1]][1]-7), which(weekly$week==weekly$week[weekly$week>july4[2]][1]-7)) weekly$flag<-0 weekly$flag[myrows]<-1 It...

...O","EURO","EURO", "EURO", "EURO","EURO", "EURO","EURO"), tenor = c("1 day","1 day","1 day","1 day","1 week","1 week","1 week","1 week","2 weeks","2 weeks","2 weeks","2 weeks","1 day","1 day","1 day","1 day","1 week","1 week","1 week","1 week","2 weeks","2 weeks","2 weeks","2 weeks",&quot...

...a variable named 'WEEK' that takes the numbers 1:26 (26 week time-period) with each number repeated five times consecutively (once for each weekday, Monday through Friday). Ex. 111112222233333.....2626262626. I would like to randomly extract two weekdays per five day week for each of 26 weeks and store this data as a separate dataframe. I have been unable to get the sample function to work properly. I have also tried using the runif function to assign random numbers to each row of my dataframe, sort the dataframe first by week number then by random number value, and finally select t...

Dear R-community, I started using R to control yield and output from different factories by production week. A typical example is below. Location Week ShippedWafer SortedWafer UnsortedWafer WaferYield GoodDie A 47 9 4 5 0.476 -12 B 40 5 5 0 -0.3262 -9 B 48 2 1

Dear R community, I performed a generalized linear mixed model using glmmPQL (MASS library) to analyse my data i.e : y is the response with a poisson distribution, t and Trait are the independent variables which are continuous and categorical (3 categories C, M and F) respectively, ind is the random variable. mydata<-glmmPQL(y~t+Trait,random=~1|ind,family=poisson,data=tab) Do you think it

Hello R-users, Does anyone know how obtain the week of a date? (in SPPS the instruction is "xdate.week") Thanks, Juan Ramon -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the

Dear R-help group, I have a dataset with daily closing prices from a stock exchange (consecutive 5 trading days) from a firm trading a specific commodity. The date variable looks like: quote_date 20080411 With the format; yyyymmdd. Moreover, I have another data set with a (average) weekly price of the underlying commodity. The date variables in this dataset are only year and a week number. I

...o recode it, using a more flexible command such as lme or lmer. Once I have the equivalent syntax down, I would ideally like to re-run my analysis using "family = poisson", as CO is actually count data. I have a dataset including a response variable CO, measured once per Week (for 11 weeks) at 13 Locations. The 13 Locations are divided into 2 habitat types (Control and Treatment). Thus: CO is a continuous response variable, Week is a fixed categorical factor, Habitat is a fixed categorical factor, and Location is a random categorical factor nested within Habitat. Here is my mo...

Hi: I have been able to finally crunch my data by importing it by week(thank you all for your help),but here we go again.. Now I'am trying to do it for the the whole year. Since the dataset is huge I'm only making a 3 weeks dataframe. - I want to get the mean of pd by week - I want to count the number of days by week and bind it to the existing dataframe(x) - I want to remove the NA's by week and bind another column counting the rows after the NA's are removed. Don't think that I'am crazy but I need t...

Even though I work with R since a year or so I still struggle with simple problems. I hope someone can help me with this. Been trying for days and am a little frustrated now. I have a data frame somewhat like the one bellow: dattrial<-data.frame(a=c(1,NA,rnorm(4,10)), Week=c(3,3,3,4,4,4)) I want to know how many NAs I have in week 3 and in week 4. -- View this message in context:

 Hi:  Using nls how can I increase the numbers of iterations to go beyond 50.  I just want to be able to predict for the last two weeks of the year.  This is what I have:  weight_random <- runif(50,1,24)  weight <- sort(weight_random);weight weightData <- data.frame(weight,week=1:50)                          weightData plot(weight ~ week, weightData) M_model <- nls(weight ~ alpha + beta*exp(gamma*week), weightData,    ...

Hi: I have usually used the GROWTH() excel function to do this but now want to see if I can do this with R. I want to predict values into the future, possibly with the predict.arima Function. I have the following weekly fish weight averages: weight <- c("2.1","2.4","2.8","3.6","4.1","5.2","6.3") week <-

Hi My data looks like this startDate="2008-06-01" dateRange =c( "2008-10-01","2008-12-01") Is there any method to find the week number from the startDate range ----- Thanks in Advance Arun -- View this message in context: http://r.789695.n4.nabble.com/Week-number-from-a-date-tp4410223p4410223.html Sent from the R help mailing list archive at Nabble.com.

Apparently any (?) call of the form cut(date,"weeks") where the date *begins the week*, gives the error Error in 1:(1 + max(which(breaks < maxx))) : result would be too long a vector In addition: Warning message: In max(which(breaks < maxx)) : no non-missing arguments to max; returning -Inf To my surprise, this was first reported...

Hi R users, I am looking for a date function that will give the following: - The number-of-week value is in the range 01-53 - Weeks begin on a Monday and week 1 of the year is the week that includes both January 4th and the first Thursday of the year. If the first Monday of January is the 2nd, 3rd, or 4th, the preceding days are part of the last week of the preceding year. This is similar to the SAS...

We have CENTOS 5 on DELL server. I tried to setup schedule cron job to run every other week on Saturday (NOT first and third week ). Does ayone has ideal how to do it? Thanks. ___________________________________________________ ??????? ? ???????????????? http://messenger.yahoo.com.tw/

Hi all, I have a large dataset with ~8600 observations that I want to compress to weekly means. There are 9 variables (columns), and I have already added a "week" column with 51 weeks. I have been looking at the functions: aggregate, tapply, apply, etc. and I am just not savvy enough with R to figure this out on my own, though I'm sure it's fairly easy. I also have the Dates (month/day/year) for all of the observations, but I figured just having a week column may be easi...

Does lme prediction work correctly with poly() terms? In the following simulated example, the predictions are wildly off. Or am I doing something daft? Milk yield for five cows is measured weekly for 45 weeks. Yield is simulated as cubic function of weekno + random cow effect (on intercept) + residual error. I want to recover an estimate of the fixed curve. ############### library(nlme) set.seed(1) ncows <- 5; nweeks <- 45; week <- 1:nweeks mcurve <- 25 + 0.819*week - 0.0588*week^2 + 0.0006...

...es(c("02/27/92", "02/27/92", "01/14/92","02/28/92", "02/01/92")) dts dts.chron <- as.chron(dts) dts.chron class(dts.chron) # all of these component extractions work: months(dts.chron) weekdays(dts.chron) years(dts.chron) quarters(dts.chron) # but weeks() doesn't seem to work weeks(dts.chron) ?chron tells me: . . . The functions days(), months(), quarters(), years(), weeks(), weekdays(), hours(), minutes(), and seconds() take any chron object as input and extract the corresponding time interval . . . . Any advice? Thanks. Chris Ryan SUNY U...

Dear all, I?m analyzing this dataset containing biodiversity indices, measured over time (Week), and at various contaminant concentrations (Treatment). We have two replicates (Replicate) per treatment. I?m looking for the effects of time (Week) and contaminant concentration (Treatment) on diversity indices (e.g. richness). Initial analysis with GAM models showed temporal autocorrelation of