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我试图在libSVM中获得概率输出(packeage e1071 in R),但输出结果只有TRUE或FALSE与我的数据集。如何在R中使用libSVM(package e1071)?
按照代码:
dadosBrutos<-read.csv("Dataset/circle.data",header = FALSE)
svm.modelo <- svm(V3 ~ .,
data=conjuntoTreinamento,
type='C-classification',
probability=TRUE)
#cost=c,
#type='C-classification',
#kernel='linear',
#scale=FALSE,
#verbose=FALSE
svm.predict <- predict(svm.modelo,
subset(conjuntoTreinamento,
select = -V3),
probability=TRUE)
posterior <- as.matrix(svm.predict)
但是,当我使用的数据集虹膜例如,概率输出%和阶级的不是名称。
library(e1071)
model <- svm(Species ~ ., data = iris, probability=TRUE)
pred <- predict(model, iris, probability=TRUE)
head(attr(pred, "probabilities"))
# setosa versicolor virginica
# 1 0.9803339 0.01129740 0.008368729
# 2 0.9729193 0.01807053 0.009010195
# 3 0.9790435 0.01192820 0.009028276
# 4 0.9750030 0.01531171 0.009685342
# 5 0.9795183 0.01164689 0.008834838
# 6 0.9740730 0.01679643 0.009130620
有人可以帮助我理解这一点吗?