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2009 Dec 01
2
Cut intervals (character) to numeric midpoint; regex problem
Starting with the head of a 499 element matrix whose column names are
now the labels trom a cut() operation, I needed to get to a vector of
midpoints to serve as the basis for plotting a calibration curve
( exp(linear predictor) vs. :
> dput(head(dimnames(mtcal)[2][[1]])) # was starting point
testvec <- c("(-8.616,-3.084]", "(-3.084,-2.876]", "(-2.876,-2.756]",
"(-2.756,-2.668]",
"(-2.668,-2.597]", "(-2.597,-2.539]")
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