混淆矩阵错误:错误:`data`和`reference`应该是具有相同水平的因素

问题描述 投票:0回答:1

我目前正在尝试构建一个神经网络来预测人们在数据中的排名。

等级系统为:A、B、C、D、E

一切都运行得非常顺利,直到我到达我的混淆矩阵。我收到错误“错误:

data
reference
应该是具有相同水平的因子。”。我在其他帖子上尝试了很多不同的方法,但似乎都不起作用。

NNPredictions 和 test$Rank 中的级别相同。我用 table() 检查了它们。

library(readxl)
library(caret)
library(neuralnet)
library(forecast)
library(tidyverse)
library(ggplot2)



Indirect <-read_excel("C:/Users/Abdulazizs/Desktop/Projects/Indirect/FIltered Indirect.xlsx", 
    n_max = 500)

Indirect$Direct_or_Indirect <- NULL


Indirect$parentaccount <- NULL


sum(is.na(Indirect))


counts <- table(Indirect$Rank)



barplot(counts)

summary(counts)



part2 <- createDataPartition(Indirect$Rank, times = 1, p = .8, list = FALSE, groups = min(5, length(Indirect$Rank)))

train <- Indirect[part2, ]
test <- Indirect[-part2, ]

set.seed(1234)

TrainingParameters <- trainControl(method = "repeatedcv", number = 10, repeats=10)

as.data.frame(train)
as.data.frame(test)

NNModel <- train(train[,-7], train$Rank,
                  method = "nnet",
                  trControl= TrainingParameters,
                  preProcess=c("scale","center"),
                  na.action = na.omit
)

NNPredictions <-predict(NNModel, test, type = "raw")



summary(NNPredictions)





confusionMatrix(NNPredictions, test$Rank)

长度(NN预测) 长度(测试$排名)

长度(NN预测) [1] 98 长度(测试$排名) [1] 98

表(NNPredictions,测试$Rank,useNA =“ifany”) NN预测 A B C D E 1 0 0 0 0 乙 0 6 0 0 0 0 0 11 0 0 d 0 0 0 18 0 E 0 0 0 0 62

r machine-learning neural-network confusion-matrix
1个回答
0
投票

同时将

method = "prob"
更改为
method = "raw"

Table1 <- table(NNPredictions, test$Rank, useNA = "ifany")

cnf1 <- confusionMatrix(Table1)

dclarson 提供的答案

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