luzdat: Brightness of Snacks Dataset

In gwer: Geographically Weighted Elliptical Regression

Description

This dataset its a part of a study development by the nutritional department of USP (S\~ao Paulo University) such that is compared five new type composition of the snack with low saturated fat and fatty acids.

Usage

data(luzdat)

Format

The "data" slot is a data frame with 150 observations on the following 4 variables.

y

the brightness of the product on a scale of 0 to 100 (the higher the value the product lighter).

x1

its the type compositions for the news snacks.

x2

its the time (in weeks) when was measurements the brightness of the product.

rot

a characters vector that indicate the group-week-measurement for each snack.

References

Paula, G. A., de Moura, A. S. and Yamaguchi, A. M. (2004). Relat\'orio de an\'alise estat\'istica sobre o projeto: estabilidade sensorial de snacks aromatizados com \'oleo de canola e gordura vegetal hidrogenada. RAE-CEA 04105, IME-USP.

Examples

data(luzdat)
y <- luzdat$y
x1 <- luzdat$x1 ; x1 <- factor(x1) ; x1 <- C(x1,treatment)
x2 <- luzdat$x2
x3 <- (luzdat$x2)^2
luz <- data.frame(y,x1,x2,x3)
elliptical.fitt <- elliptical(y ~ x1+x2+x3, family = Student(df=5)
,data=luz)

gwer documentation built on April 28, 2021, 9:07 a.m.