gp regression tube is not evaluated at enough points

[karlnapf]

@Saurabh7

the tube should have a finer grid. that is, the test data for the tube should have the same resolution as the plotted mean prediciton.

let me know if you have questions

[Saurabh7]

@karlnapf I have set a constant number of points in #50 instead of depending on training points, please check if thats better.

[karlnapf]

seems like a good idea, maybe we could even have an option for the number of testing points? might also help for the predictive distribution

[karlnapf]

i like the new grid!

there are lots of errors if you switch between fitc and exact inference with and without learning hyperparameters, could you play a bit and investigate ?

[Saurabh7]

Hmm.. I think we need to reset default parameters before learning, will do that.