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avgprice
2012 Jan 04
0
Non Negative Least Squares Regression with nnls
...nteractions by doing (a*b). How do I model interactions with nnls? Any workarounds to manually perform interactions if no built-in way?
I'm not a statistician; any links to references are highly appreciated as are any relevant workarounds or alternative approaches.
Code:
library(nnls)
#data
avgprice <- c(116.0666667,145.1034483,145.75,131.6666667,113.8163265,122.7142857,120.5882353)
stars <- c(2.5,2.5,2.5,2.5,3,3,3)
lookahead <- c(2,30,60,15,2,30,60)
#regular regression
reg1 <- lm(avgprice ~ stars + lookahead + stars*lookahead)
summary(reg1)
#Non-negative
s<-cbind(stars,looka...