[R] MatchIt package

Hello, I get the following error when running the example in the MatchIt package, demo(analysis) > ate.all <- c(s.out1$qi$att.ev, -s.out2$qi$att.ev)Error in -s.out2$qi$att.ev : > invalid argument to unary operatorIn addition: Warning messages:1: In > setx.default(z.out1, data = match.data(m.out

Re: [R] MatchIt Package

Kind of hard to figure out the problem without a reproducible test case. Hint: see the posting guide. --- Jeff Newmiller The . . Go Live... DCN: Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research E

[R] MatchIt Package

Hi there dear R users! Anyone knows why does matchit function returns error whenever the "hull" option is used (either "hull.both", "hull.control" or "hull.treat"). Things work well with all the rest of discard options. This is the error msg. >m.out.base <- matchit(formula=f, data=d, method=m,