Can no longer return beta coefficients using MuMIn package in R -

when using r package mumin (v1.9.5), , command dredge, beta = true switch no longer functions expected.

# load cement data set mumin package data(cement)  # build global model fmd <- lm(y ~ x1 + x2 + x3 + x4, data = cement)  # dredge global model without returning standardized coefficients (default);  # working  ms1 <- dredge(fmd)  # dredge global model , return standardized coefficients;  # not working  ms1 <- dredge(fmd, beta = true) 

the latter returns:

error in dimnames(ret) <- list(names(model$coefficients), c("estimate",  :    length of 'dimnames' [1] not equal array extent 

using r v3.0.0

confirmed mumin 1.9.5 ... looks there bug in beta.weights() function.

the fourth line,

 coefmat <- coeftable(model)[, 1l:2l] 

should be

 coefmat <- coeftable(model)[, 1l:2l, drop=false] 

you can fix yourself, temporarily, follows:

fix(beta.weights) ## opens editor; make change in editor , save/exit assigninnamespace("beta.weights",beta.weights,"mumin") 

however, idea contact package maintainer (see help(package="mumin") , submit bug report ...