similar to: [Rd] reshape scaling with large numbers of times/rows

Dear R Programmers! After some time of using R I decided to work through John Chambers book "Programming with Data" to learn what these S4 classes are all about and how they work in R. (I regret not having picked up this rather fine book earlier!) I know from the documentation and the mailing archives that S4 in R is not 100% the book and that there are issues especially with

Hello guys.I just read up about tf-idf schemes and want to implement it in Xapian (with some frequently used normalizations) as it will also give me a good hang of implementing a weighting scheme before I start working on implementing DFR schemes. I read the following as references and I think Ive understood it well and can write the hack :- 1.)

On Mon, May 22, 2017 at 07:45:59AM +0200, Jean-Francois Dockes wrote: > Olly Betts writes: > > Assuming nobody deleted the log file, this could be a Xapian bug. This I meant "lock file" not "log file" here. > > isn't something we're drowning in reports of, so presumably it doesn't > > trigger easily, so finding a way to reproduce would be

On Wed, May 03, 2023 at 12:38:15PM +0000, Eric Wong wrote: > Olly Betts <olly at survex.com> wrote: > > This will also effectively ignore boolean terms, assuming you're giving > > them wdf of 0 (because $3 here is the collection frequency, which is > > sum(wdf(term)) over all documents). > > Should boolean terms be ignored when estimating flushing >

Olly Betts writes: > On Wed, May 17, 2017 at 09:08:32PM +0200, Jean-Francois Dockes wrote: > > I have a user reporting the following error during recoll indexing: > > > > flush() failed: Db block overwritten - are there multiple writers? > > > > "flush() failed" is from recoll, the rest is, I think the text of the Xapian > > exception.

Olly Betts <olly at survex.com> wrote: > On Mon, Mar 27, 2023 at 11:22:09AM +0000, Eric Wong wrote: > > Olly Betts <olly at survex.com> wrote: > > > 10 seems too long. You want the mean word length weighted by frequency > > > of occurrence. For English that's typically around 5 characters, which > > > is 5 bytes. If we go for +1 that's:

I appear to have hit one of the "drop" issues raised in some discussions a couple of years ago by Frank Harrell. They don't seem to have been fixed, and I'm under some pressure to get a quick solution for a forecasting task I'm doing. I have been modelling some retail sales data, and the days just after Thanksgiving (US version!) are important. So I created some dummy

On Mon, May 16, 2016 at 12:35:53PM -0400, Alex Aminoff wrote: > I was thinking about this some more: Is there a reason I can't just > weight by some function of recency at indexing time? > > $weight = get_weight_based_on_recency(...); > $tg->index_text($txt,$weight); The second parameter there is a WDF multiplier, which isn't really "weight". It depends on

I un-commented the following in my environments.rb file config.plugins = [ :all, :exception_notification, :ssl_requirement] but I get the following errors: in `ensure_all_registered_plugins_are_loaded!'': Could not locate the following plugins: exception_notification and ssl_requirement (LoadError) from /Users/mitch/.gem/ruby/1.8/gems/rails-2.3.2/lib/rails/plugin/loader.rb:44:in

Hello guys.I am working on implementing the PL2 weighting scheme of the DFR framework by Gianni Amati. It uses the Poisson approximation of the Binomial as the probabilistic model (P), the Laplace law of succession to calculate the after effect of sampling or the risk gain (L) and within document frequency normalization H2(2) (as proposed by Amati in his PHD thesis). The formula for w(t,d) in

I have assayed the concentrations of various metal elements in different anatomic regions of two strains of mice. Now, for each element, in each region, I want to do a t test to find whether there is any difference between the two strains. Here is what I did (using simulated data as an example): # create the data frame > elemconc = data.frame(expand.grid(id=1:3, geno=c('exp',

Hello, I'm having problems working with date values in POSIXct format. Here is what I got (eg.lig attached): x <- read.table("eg.txt", sep = ',', col.names=c("ok","time","secs","lig")) # it gives time as factor z <- cbind(x,colsplit(x$time, split="\\s", names=c("date", "clock")))

Dear all, I'm looking to create a formula within a function to pass to glmer() and I'm having a problem that the following example will illustrate: library(lme4) y1 = rnorm(10) x1 = data.frame(x11=rnorm(10), x12=rnorm(10), x13=rnorm(10)) x1 = data.matrix(x1) w1 = data.frame(w11=sample(1:3,10, replace=TRUE), w12=sample(1:3,10, replace=TRUE), w13=sample(1:3,10, replace=TRUE)) test1 <-

On Mon, Mar 27, 2023 at 11:22:09AM +0000, Eric Wong wrote: > Olly Betts <olly at survex.com> wrote: > > 10 seems too long. You want the mean word length weighted by frequency > > of occurrence. For English that's typically around 5 characters, which > > is 5 bytes. If we go for +1 that's: > > Actually, 10 may be too short in my case since there's a

Dear list, Consider the following, library(grid) w = unit.c(unit(1, "in"), unit(2, "in")) w2 = w + unit(1, "mm") w[2] <- 0 w2[2] <- 0 convertUnit(w, "mm") #[1] 25.4mm 0mm convertUnit(w2, "mm") #Error in grid.Call("L_convert", x, as.integer(whatfrom), as.integer(whatto), : # INTEGER() can only be applied to a

I have a strange problem, apparently contradicting man pages and recent postings on --include / --exclude options. On the server host I have directories to replicate only if they match a specific pattern ( date in different formats), they might be located 1 or 2 levels down from root directory and these parent directories (but not files) have to be replicated too. I understand, that given :

Hi, I would like to create wireframe plots conditional on 2 variables and use different limits for the 3-axes in each plot. I thought I could do this with subscripts and the panel.wireframe but I haven't been successful. I am getting this error "...multiple actual arguments..." so I definitely don't have something set up correctly. Listed below is the code to generate the

Hi all: I am experiencing a problem where WinNT and Samba are dropping connections during file transfers. I have the following smb.conf settings: keep alive = 30 dead time = 1440 socket options = IPTOS_THROUGHPUT SO_KEEPALIVE (although I tried IPTOS_NODELAY with no apparent benefit). The client is copying a large number of files up to the server, then there is a pause at a random file,

Hi All, I am trying to build a new R package to submit, but it's failing to create a tex manual: R CMD check Biodem * checking for working latex ... OK * using log directory '/home/greatsage/Fede/R-packages/temp/Biodem.Rcheck' * checking for file 'Biodem/DESCRIPTION' ... OK * checking if this is a source package ... OK * Installing *source* package 'Biodem' ... ** R

Hi Maria Rule 1 make sure your data is in the right format dat <- source("G:/1/savedat.txt") > dat $value Location Date Zn2 upper.zn lower.zn 1 upstream 2016-04-27 29.92477 55.59800 13.912207 2 spill 2016-04-27 12.84040 22.07006 6.964934 3 downstream 2016-04-27 22.49673 41.60901 11.739109 4 upstream 2016-06-28 23.98425 45.60219 10.690640 5