java.lang.exception error when using CVParameterSelection

[Ethan Lee]

Hi, guys. I need your help to use CVParameterSelection. I tried to find some optimized paramters for K-nearest neighbor (ibk) but i've got an error message "java.lang.Exception while updating CVParameters: CVParameter 1 java.lang.String: Four or Five components expected!" when i tried to change [0 java.lang.String -> 1 java.lang.String]. How can I do this? Thanks.

[Mark]

Which parameter are you trying to optimise? E.g. for the K parameter of IBK you need to enter something like:

K 1 10 10

This will explore K values from 1 to 10 with 10 steps (e.g. incrementing K by 1 each time). To have 4 steps (e.g. K = 1, 4, 7, and 10):

K 1 10 4

Pressing the "More" button on the CVParameterSelection editor dialog in the GUI gives you usage instructions.

Cheers,
Mark.