Help with random forest prediction (weka)

KNIME Analytics Platform
1

Hi,

I am using random forest to predict a field. i am using weka predictor(3.7) to predict the value and random forest (3.7) as learner. I have another dataset where i do not have target attribute. when am connecting the random forest to another weka predictor which is connected to the file am having the following error:

ERROR WekaPredictorNodeDialog Error loading model settings

ERROR 7) Execute failed: java.lang.IllegalArgumentException: Column name(s) not found: <field>

any help?

2

Hi Shannon,

I just confirmed this as a bug, and have notified the development team. In the meantime you could instead try using the native KNIME nodes: ensemble learner and ensemble predictor, which are also implementations of a random forest.

Cheers,

Jon

 

3

Hi Shannon,

The developers have fixed the bug which means that the weka random forest nodes will function correctly again in the next release.

Cheers,

Jon

4

This bug appears for all classification nodes other than randomforest in weka 3.7 integration insite of updates. Not in 3.6. Please fix it urgently.