[R] Row name of empty string issue

I have a data.frame with rownames taken from a database. Unfortunately, one of the rownames (automatically obtained from the DB) is an empty string. I often do computations on the DB s.t. the answers (rows) are indexed with respect to the rownames so a computation on a DB record might

[R] Function for trim blanks from a string(s)?

I feel like an idiot posting this because every language I've ever seen has a string function that trims blanks off strings (off the front or back or both). Ideally, it would process whole data frames/matrices etc but I don't even see one that processes a single string. But I've searched and I

[R] exclusion rules for propensity score matchng (pattern rec)

Dear R-list, i have 6 different sets of samples. Each sample has about 5000 observations, with each observation comprised of 150 baseline covariates (X), 125 of which are dichotomous. Roughly 20% of the observations in each sample are treatment and the rest are control units. i am doing

[R] qcc package syndromic surveillance (multivar CUSUM?)

Dear R Community: I am working on a public health early warning system, and I see that the qcc package allows for CUSUM and other statistical quality tests but I am not sure if my project is a good match for qcc functions as written. Any advice you may have is very much appreciated. I have four

[R] strucchange-esque inference for glms ?

hello R-world, according to the strucchange package .pdf, all procedures in this package are concerned with testing or assessing deviations from stability in the classical linear regression model. i'd like to test/assess deviations from stability in the Poisson model. is there a way to modify

[R] drawing half-circles

Dear wonderful R community, I've been creating color-coded concentric circles using the points function, but I just realized that what I would really like to do is draw color-coded concentric half-circles. (Because I want to communicate information about the diameters-- half-circles are

[R] aregImpute: warning message re: acepack and mace

hi, i'm trying to learn how to use aregImpute by doing the examples provided with the package, and after installing Hmisc.1.6-1.zip (for Windows), and running the very first example on R 1.7.1, i get an error message warning me about mace (see below) and acepack. i found the acepack package,

[R] contourplot:how to get it to label all contours like 'contour'

Hi, one of the nice things about contour is that it labels all contour lines. contourplot only labels each particular elevation a single time. i.e., if there are two contour lines corresponding to z = 45, it will only label one of them. is there a way to get contourplot to automatically label