Q13 bizarre results

[Steph]

Hi,

Just wondering if anyone has encountered what I'm seeing, or if (more likely) I'm doing something stupid...

I'm using the svm command in the e1071 package in R to implement hard margin SVM. Working on Q14, Ein is often not 0, but most of the time when Ein > 0, I actually get Ein = 100. That is, the data set is linearly separable in the Z space, but for some reason the response values are exactly flipped.

This seems bizarre to me, yet I can't figure out why it might be happening. I'm wondering if I'm not correctly implementing the constant "b". I simply added a column of ones to my x matrix and moved forward with svm.

Any thoughts would be much appreciated.

Thanks,
Steph