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smc77/logistic_regression_multi.R

Created October 28, 2011 03:28
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Multiclass Logistic Regression
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logistic_regression_multi.R
# Plot the data
pairs(iris[1:4], main = "Anderson's Iris Data -- 3 species", pch = 21, bg = c("red", "green3", "blue")[unclass(iris$Species)])
# Use linear discriminant analysis
iris.lda <- lda(Species ~ ., data = iris)
summary(iris.lda)
# Use a multinomial logistic regression model
library(VGAM)
iris.vglm <- glm(Species ~ , family=multinomial, data=iris)
summary(iris.vglm)
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