similar to: Associating the day of week to a daily xts object

Hi, I have a very large data set stored as an xts object. xts is very nice about showing row labels as "human readable" dates and times. I want the actual epoch values that are stored internally. The only way I can find to access them is one-at-a-time using the internal function: xcoredata() Calling this in an entire column, the "R" way doesn't work. It will only

Hello, i got an warning message in the following code: f<-1:100 t<-1:100 b<-100 ll2 <- function(b,f,t) { t<-cumsum(t) tn<-t[length(t)] i<-seq(along=f) s1<-(tn*exp(-b*tn)*sum(f[i]))/(1-exp(-b*tn)) s2<-sum((f[i]*(t[i]*exp(-b*t[i])-t[i-1]*exp(b*t[i-1])))/(exp(-b*t[i-1])-exp(-b*t[i]))) s1-s2 } ll2(b,f,t) i think, the problem here is, that t[0] doesn't

Hi, I want to sample from a distribution (say a normal distribution, for example) using vectors of the different parameters (i.e. the mean and standard deviation). That is, I have a list/vector of say 100 means and another of the corresponding 100 SD's, and I want a matrix of 100 rows (one for each mean and SD pair) each having 1000 random samples. Something like: sample_matrix =

Let me first tell you that you and your cohorts are doing a great service to the statistical community with R. I have been working with Rseptbeta under Win95 and I am very impressed with its capabilities. I thought I give you some feedback gained from my limited playing with R. Fritz Scholz fritz.scholz at boeing.com ============================================================= When

Dear List, I need to print out each of 'k' levels of a factor 'n' times each, where 'n' is the number of elements belonging to each factor. I know that this can normally be done using the gl() command, but in my case, each level 'k' has an unequal number of elements. Example with code is as below: vc<-read.table("P:\\Transit\\CORRECT

Using the input below, can I do something more elegant (and more efficient) than the loop also listed below to pad strings to a width of 5? The true matrix is about 300K rows and 31 columns. ####################### #INPUT ####################### > temp DX1 DX2 DX3 1 13761 8125 49178 2 63371 v75 22237 3 51745 77703 93500 4 64081 32826 v72 5 78477 43828 87645 >

Dear R-users, To obtain the percentage of deviance explained when fitting a gam model using the mgcv library is straightforward: summary(object.gam) $dev.expl or alternatively, using the deviance (deviance(object.gam)) of the null and the fitted models, and then using 1 minus the quotient of deviances. However, when a gamm (generalizad aditive mixed model) is fitted, the

Hello. I?ve seen several uses of '%?%' in R code (with ? = a single letter or other characters used as the middle character in a 3 character string with '%' as the 1st and 3rd characters). I?ve also recently seen ?%+%? usage at: http://vita.had.co.nz/papers/ggplot2-wires.pdf on p. 7 of the document the following code appears: (Note the '%+%' string at end of 1st line.)

Hi All, I would like to ask the following. I have an array of data in an objetct, let's say X. I need to use a for loop on the elements of one or more columns of X and I am having a debate with a colleague about the best memory management. I believe that if I do: col1 = X[,1] col2 = X[,2] ... colx = X[,x] and then for(i in whatever){ do something using col1[i], col2[i] ... colx[i] }

Hi, Does anybody knows how to coerce an mcmc objetct to a rv object without loose the information about what parameters. was simulated I tried do it but it looks that this informatio was lost. Thank you very much for any information. Gilberto Matos.

I am using a nested model in R and the lm output shows 47 not defined because of singularities and I have no idea why. Any help on why this is happening or how to fix this problem would be very much appreciated. Below is the output I received from R. Thanks and happy holidays! Call: lm(formula = Dist ~ Treatment/SiteL/Territory) Residuals: Min 1Q Median 3Q Max -6.646 -1.443

Hi. On the release version of Debian Wheezy, I am missing symbols for left and right brackets in plotmath. Anybody see similar trouble while reviewing demo(plotmath)? This is a completely clean, fresh install. I've not installed any peculiar libraries or packages, except R, the installation of which still puzzles me. I configured a CRAN mirror for packages using squeeze-cran3 folder, and

Hi all R-Experts, I'm facing one problem in yahoo data downloading. I'm suing Windows XP, R 2.2.0, and i'm using yahoo.get.hist.quote function to download data. I need 500 companies of S&P index daily 'closing price' data for last ten years. My questions are: 1) I have all the ticker names of S&P 500 companies in a .csv format. I'm reading those names in R and

Dear Railers, I am toying with a new project and have a schema design question. I have a tree-like node structure. Each of the nodes will be associated with a single object. This associated object can be of a variety of types. I represent the tree through a Node class which acts_as_tree. Now imagine three other classes--Animals, Fruits and Vegetables. Each node will have an association

Is there a way by which i can associate a complex query with a Model class without using a VIEW, so that i can access all the names of the columns returned by the query.

Hi, I will admit I am very new to ruby and I am trying to do something that is not in any tutorials I have found. If you see a more conventional way to do some of the things I am trying to do, please let me know. What I am trying to accomplish. People can edit the comments on the same page as the listing of posts. The problem is that when I go to create the comment, it is not getting associated

Hi, I'm trying to get point & print working against a 4.0.10 Samba server (using the sernet packages if that's relevant). I have the printer itself setup and I've uploaded the driver, but associating the uploaded driver with the printer causes Windows to give an error: "Printer settings could not be saved. Access is denied". I'm seeing the same symptoms on XP and

I have followed the documents on the net regarding installing fonts in Wine. I currently have a T_FON.FON font and when I follow the directions about installing fonts I end up with a filename of Bedrock.pcf. How do I go about getting Wine to know to use this font when the program is looking for T_FON.FON

Pekka Nikander wrote: >>>> I thought about that more, and I think the "right" way would be to have a syntax like >>>> >>>> !21 = metadata !{ typeval %struct.T, metadata !11 } >>>> >>>> to avoid the problem with the keyword 'type'. >>>> >> >> Anyway, I already implemented an early patch for making

Hi Is there a way to associate additional info with every opcode like an id either through the td files or when building an instruction ? thanks shrey