[英]R - how do you get breakpoints in segmented function programatically?
使用mtcars數據集,我試圖確定mpg的折線回歸擬合與hp和wt以及斷點的關系。 這是代碼:
mpg = mtcars$mpg
wt = mtcars$wt
hp = mtcars$hp
reg = lm (mpg ~ hp +wt)
hp_thresh = 150
wt_thresh = 3
library(segmented)
seg.o = segmented (reg,seg.Z=~hp+wt, psi=list (hp=hp_thresh, wt=wt_thresh))
summary (seg.o)
如何以編程方式獲取斷點?
想通了,以下是竅門:
summary.segmented(seg.o)$psi [1,2]
summary.segmented(seg.o)$psi [2,2]
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