..Error (randomForestModel)在树[，2]中的不同运行时抛出错误:维数不正确
..Error (randomForestModel)在树[，2]中的不同运行时抛出错误:维数不正确
提问于 2020-01-03 09:39:29
同时尝试建立一个简单的RF回归模型并导出为PMML。我发现，对于数据，尽管总是构建模型，但导出为PMML并不总是成功的。对于多次运行，它都会抛出错误。详情见下文。
数据集:示例
R代码
> (model.rf <- randomForest(y~ ., data=updatedDataset,ntree=6))
Call:
randomForest(formula = y~ ., data = updatedDataset, ntree = 6)
Type of random forest: regression
Number of trees: 6
No. of variables tried at each split: 2
Mean of squared residuals: 166.4923
% Var explained: 46.47
> pmml(model.rf)
Now converting tree 1 to PMML
Now converting tree 2 to PMML
Now converting tree 3 to PMML
Now converting tree 4 to PMML
Now converting tree 5 to PMML
Now converting tree 6 to PMML
**Error in tree[, 2] : incorrect number of dimensions**
> (model.rf <- randomForest(y~ ., data=updatedDataset,ntree=5))
Call:
randomForest(formula = y~ ., data = updatedDataset, ntree = 5)
Type of random forest: regression
Number of trees: 5
No. of variables tried at each split: 2
Mean of squared residuals: 132.1672
% Var explained: 57.51
>pmml(model.rf) worked fine.............................................特别是对于少数others..nothing，它失败了。
> (model.rf <- randomForest(y~ ., data=updatedDataset,ntree=8))
Call:
randomForest(formula = y~ ., data = updatedDataset, ntree = 8)
Type of random forest: regression
Number of trees: 8
No. of variables tried at each split: 2
Mean of squared residuals: 191.4946
% Var explained: 38.43
> #model.rf
> pmml(model.rf)
Now converting tree 1 to PMML
Now converting tree 2 to PMML
Now converting tree 3 to PMML
Now converting tree 4 to PMML
Error in tree[, 2] : incorrect number of dimensions
> (model.rf <- randomForest(y~ ., data=updatedDataset,ntree=9))
Call:
randomForest(formula = y~ ., data = updatedDataset, ntree = 9)
Type of random forest: regression
Number of trees: 9
No. of variables tried at each split: 2
Mean of squared residuals: 155.9007
% Var explained: 49.88
> #model.rf
> pmml(model.rf)
Now converting tree 1 to PMML
Now converting tree 2 to PMML
Now converting tree 3 to PMML
Error in tree[, 2] : incorrect number of dimension此行为的原因以及如何确保其始终正常工作是查询。
谢谢！
回答 1
Stack Overflow用户
发布于 2020-01-03 14:59:27
您是否尝试过使用r2pmml package导出随机林模型？
r2pmml(model.rf, "MyRandomForest.pmml")r2pmml是成功还是失败？与遗留的pmml包相比，r2pmml包更智能、更快，因此它可能知道如何正确地处理模型对象。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/59576164
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