Exemples:
- Modele Adbudg, approche lentement la saturation [2.20]
- Modele Adbudg, approche rapidement la saturation (forme en S) [2.20_2]
1. a=10
2. b=1
3. c=0.5
4. d=2
5. x<-seq(0,10,1)
6. y<-b+(a-b)*((x)^c/(d^c+(x)^c))
7. df<-data.frame(Effort=x, Ventes=y)
8. c=2
9. y<-b+(a-b)*((x)^c/(d^c+(x)^c))
10. df$Ventes2<-y
11. df
12. matplot(x, df[,2:3], pch = 1:2, type = "o", col = 1:2,xlab="Valeurs de x", ylab="Ventes et/ou Profits"
13. legend(min(x), max(df[,2:3]),names(df)[2:3], lwd=3, col=1:2, pch=1:2)