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rescale variable on open interval (0, 1)
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| rescale_beta <- function(x, lower, upper) { | |
| # rescales onto the open interval (0,1) | |
| # rescales over theoretical bounds of measurement, specified by "upper" and "lower" | |
| N <- length(x) | |
| res <- (x - lower) / (upper - lower) | |
| res <- (res * (N - 1) + .5) / N | |
| return(as.vector(res)) | |
| } |
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Rescale variable onto (0, 1) for beta regression. Based on Smithson & Verkuilen (2006), see http://dx.doi.org/10.1037/1082-989X.11.1.54.supp