“表中的错误(pred =预测，true = W [，8]):所有参数必须具有相同的长度" [英] "Error in table(pred = prediction, true = W[, 8]) : all arguments must have the same length"

问题描述

这是我的数据

 Anon_Student_Id           Problem_Hierarchy Problem_Name Problem_View Number_Of_Steps Sum_Of_Steps_Duration Sum_Of_Hints result
1      80nlN05JQ6 Unit ES_01, Section ES_01-6         EG21            8               3                    28            0      1
2      80nlN05JQ6 Unit ES_01, Section ES_01-6         EG21            9               3                    37            0      0
3      80nlN05JQ6 Unit ES_01, Section ES_01-6         EG21           10               3                    50            0      0
4      80nlN05JQ6 Unit ES_01, Section ES_01-6         EG22            1               3                    78            0      0
5      80nlN05JQ6 Unit ES_01, Section ES_01-6         EG22            2               3                    41            0      1
6      80nlN05JQ6 Unit ES_01, Section ES_01-6         EG22            3               3                    92            0      0

我正在尝试通过SVM模型预测属性结果":

I'm trying to predict the attribute "result" by SVM model :

model< -svm(结果〜.，scale = FALSE，data = W)

model<-svm(result~., scale=FALSE, data=W)

预测<-预测(模型，W [，-8])

prediction <- predict(model, W[,-8])

table(pred =预测，true = W [，8])

table(pred = prediction, true = W[,8])

但是我得到这个错误:

"Error in table(pred = prediction, true = W[, 8]) : 
  all arguments must have the same length"

当我检查它时，我得到:length(pred)= 2042和length(true)= 2043

When I checked it I got: length(pred)=2042 and length(true)=2043

为什么我会收到此错误? (我的意思是-为什么我得到不同的长度?"pred"和"true"应该具有相同的长度)

Why I'm getting this error?? (I mean- why i'm getting different lengths? "pred" and "true" are supposed to have the same length)

谢谢！

推荐答案

问题已解决: 我使用na.omit(W)摆脱了我的数据的所有na值，然后它起作用了. 谢谢！

Problem solved: i got rid of all the na values of my data using na.omit(W) and then it worked. thank you!

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