Hello,
My name is Craig and I need help plotting a "line" for a multiple linear
regression in R.
Here is my sample data (filename: convis.txt)
Output of convis.txt is (vis and density being predictors of either
avoidance or entrance):
vis den avoid entrance
1 10 1 0.0000 0.0000
2 10 3 0.8750 0.0000
3 8 3 0.8180 0.0300
4 8 3 0.6670 0.0667
5 8 1 0.2110 0.0000
6 6 1 0.2500 0.0000
7 10 1 0.3000 0.0000
8 10 1 0.1050 0.0000
9 8 1 0.7000 0.1000
10 3 5 0.1176 0.0588
11 3 5 0.3077 0.1150
12 3 9 0.9090 0.0900
13 3 7 0.7778 0.1110
14 3 5 0.5560 0.1110
15 3 1 0.5710 0.0000
16 3 4 0.5710 0.0000
In order to do the multiple regression, I used the following coding:
double=read.table("convis.txt",header=TRUE)
attach(double)
double
stem(vis)
stem(den)
stem(avoid)
stem(entrance)
plot(entrance,vis*den) *as means to see how the interaction between
visibility and density may impact entrance behaviors
model6=lm(entrance~vis*den)
model6
summary(model6)
*abline(model6) *Here is the issue as I used this for my simple linear
regression technique, but do not know what to use for a multiple regression*
If anybody can provide some feedback on this, it would be greatly
appreciated.
Kind Regards,
Craig
--
<>< <>< <><
Craig O'Connell
University of Massachusetts Dartmouth
Marine Biologist
www.youtube.com/craigpoconnell
craigosea.blogspot.com
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