Thank you very much!
That's exactly what I need as a starting point :-)
Antje
Greg Snow schrieb:
Here is an example that may get you started:
point1 <- c(1.1, 1.7, 255)
point2 <- c(2.2, 1.5, 180)
point3 <- c(1.8, 2.2, 60)
mydf <- as.data.frame( rbind(point1, point2, point3) )
names(mydf) <-
Here is an example that may get you started:
point1 <- c(1.1, 1.7, 255)
point2 <- c(2.2, 1.5, 180)
point3 <- c(1.8, 2.2, 60)
mydf <- as.data.frame( rbind(point1, point2, point3) )
names(mydf) <- c('x1','x2','red')
fit <- lm(red~x1+x2, data=mydf)
df2 <- expand.grid( x1=seq(min(mydf$x1), max(mydf
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