function - cv.glm cutoff value of 0.75 in r -


i doing analysis regarding binomial glm model have fitted earlier in r. while looking @ data, figured out suitable cutoff point binary outcome should 0.75 instead of 0.5. trying cost() function of cv.glm() {boot package} use 0.75 cutoff point, have failed right syntax.

i know 0.5 cutoff use:

cost <- function(r, pi = 0) mean(abs(r-pi) > 0.5)

can show me right way change cutoff point in function? (let's stick 0.75 maybe).


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