Hello,
I'd like to repeat a linear regression model for groups of rows that are
identified by an ID number.
My table is like this:
ID Y X1 X2 X3 X4
1 555 111 222 333 456
1 345 234 445 543 33
1 456 353 453 456 333
2 562 118 229 340 463
2 352 241 452 550 40
2 463 360 460 463 340
3 ....
...
...
...
....
3
3
I want to obtain an estimate of the linear model for each ID.
ex. y = a1X1 + b1X2 + c1X3 + d1X4 where ID= 1
y = a2X1 + b2X2 + c2X3 + d2X4 where ID= 2 and so on...
I'd like to obtain a table such this:
ID a b c d
1 ... ... ... ..
2 .. .. .. ..
3 .. .. .. ..
Can you sugget me something?
Can I use a "for" script?
Thank you very much!
Valeria
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
