search for: twang

The Toolkit for Weighting and Analysis of Nonequivalent Groups (twang 1.0) has been released to CRAN. The package collects functions useful for computing propensity score weights for treatment effect estimation, developing nonresponse weights, and diagnosing the quality of those weights. The package includes a vignette containing some basic theory and walks through t...

this is the problem: load this R data frame over the internet and save it to your hard drive. http://rss.acs.unt.edu/Rdoc/library/twang/data/raceproling.RData please show how to save a dataset of males only (the variable male=1) to a new dataframe. Then do the same thing for females (male=0). Then show how to recombine the two datasets to belike the original one except that the female observations come rst, then the male observati...

Dear All, Can you please suggest me a correct way to load the following R data frame from the internet and save it to the hard drive? The following is what I tried: > raceprofiling <- > read.table("http://rss.acs.unt.edu/Rdoc/library/twang/data/raceprofiling.RData") > save(raceprofiling, file = 'raceprofiling.RData') However, when I used dim() to check the dataset, I got: > dim(raceprofiling) [1] 11085 1 The correct dimension should be 5000 and 10. Many Thanks. -- View this message in context: http://r.789695....

...score adjustment, just using the estimated propensity scores as inverse probability weights (respectively 1-estimated weights for the non-treated). As far as i understood, MLE predictions of a logit model can directly be used as to estimates of the propensity score. I already considered the twang package and the several matching approaches and i am basically not trying to reinvent the wheel. Often i could not understand what was going, and why some iterative process like k.stat.max were taking so long. Anyway i?d really like to something really simple apart from all this focus on so...

Hi all, i am wondering if there?s any other method to adjust for selection related bias of estimates except propensity scoring and heckit / mills ratio approach? i also read documentation of Match and twang package so far, so i don?t speak of any ATE / ATT related methods, respectively any methods that match or stratify... Is there something else ? thx in advance

...asionally, I'm getting a very few files that give me something like the following: opendir(etc/gconf/gconf.xml.defaults/schemas/apps/panel/default_profiles): Permission denied delete_one: rmdir usr/src/linux-2.4.21-32.0.1.EL/arch/mips/ite-boards: Permission denied mkstemp usr/X11R6/man/man1/.twang.1.gz.wEaSYT failed: Permission denied It's not many files, but since I'm running as root, I'm curious why there's a problem creating/deleting/unlinking these files. Anyone have any idea? Thanks much, -- tim boyer tim@denmantire.com

...ctors and was hoping someone could provide some advice on how to proceed. I am running propensity score matching as outlined in: Greg Ridgeway, Dan McCarey, Andrew Morral, Lane Burgette and Beth Ann Grin (May 3, 2013) Toolkit for Weighting and Analysis of Nonequivalent Groups: A tutorial for the twang package and have a question about using unordered categorical variables as a covariates. The tutorial indicates that: "There is no need to ? create indicator, or dummy coded, variables to represent categorical covariates, provided the categorical variables are stored as a factor or as orde...

...ion boundary (SVM comes to mind) can be give great classifiers but offer poor probability estimates and then the propensity score weights are a mess. We've had a lot of success in practice using gbm and selecting the number of iterations to optimize balance. You can try the ps() function in the twang package which wraps up gbm and balance optimization in a single function. It's slow for large datasets but it gets the job done. Including additional variables in a weighted regression is a great protective step. It can reduce both bias and variance and can produce "doubly robust" es...

I am a newbie to samba. I have successfully setup a similar samba share on 1 machine in the past. I have everything setup as User access with the pcguest as a guest account. If I create a share to the /tmp, network users can access normally. I created a directory /var/snd and set permissions to be rwxrwxrwx. I changed the smb.conf so that permission were identical to the share for /tmp. I

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...orldmap (0.1300), sampleSelection (0.7-0), skmeans (0.2-1), Snowball (0.0-8), SNPRelate (0.9.3), soiltexture (1.2.9), soobench (1.0-73), sp (0.9-97), SpatioTemporal (0.9.2), SPOT (1.0.2257), support.CEs (0.2-1), tabuSearch (1.1), tdthap (1.1-3), textir (1.8-2), timsac (1.2.6), tm.plugin.dc (0.2-1), twang (1.2-5), XLConnect (0.1-9) New reviews ----------- * quantmod, by atomicules http://crantastic.org/reviews/143 This email provided as a service for the R community by http://crantastic.org. Like it? Hate it? Please let us know: cranatic at gmail.com.

CRAN (and crantastic) updates this week New packages ------------ * allan (1.0) Alan Lee http://crantastic.org/packages/allan Automates Large Linear Analysis Model Fitting * andrews (1.0) Jaroslav Myslivec http://crantastic.org/packages/andrews Andrews curves for visualization of multidimensional data * anesrake (0.3) Josh Pasek http://crantastic.org/packages/anesrake This

Hi all: As we know rsync is powerful in transfer/backup files, now my question is, is it possible to send/copy/backup a bunch of data from a database into other database? If yes, how? If not, is there any other tool(s) able to do so? Your any advice is appreciated. Best regards! Tony ------------------------------------------------- This mail sent through IMP: http://horde.org/imp/