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gonad
2006 May 24
1
Regression line limited by the range of values
...to use "segments", and draw one line from min(x),min(y) to
max(x),max(y) but with real data with a bunch of "na.rm" and
"na.action"s this becomes very long and bulky.
For a regression with two data swarms and two trend lines it becomes
this long mess:
<>plot(TCgonad[Period=="1"],
ABelly[Period=="1"],xlim=c(0,20),ylim=c(130,160), col=?blue?)
points(TCgonad[Period=="2"], ABelly[Period=="2"],col=?red?)
segments(
min(TCgonad[Period=="1"],na.rm=T),
min(fitted(lm(ABelly[Period=="1"]~TCgonad[Period=="...