IndexError in KneeLocator after upgrade to 0.5.3 about kneed

[tommilligan]

There is a reproducible test case in #65

[arvkevi]

Thanks, @tommilligan, good catch! I added functionality to output the y value at the knee point. In this example, there is no knee, which is throwing the IndexError.

Something like this would be great here:

# Step 6: find knee
self.knee_y, self.norm_knee_y = None, None
self.knee, self.norm_knee = self.find_knee()
if self.knee:
    self.knee_y = self.y[self.x == self.knee][0]
    self.norm_knee_y = self.y_normalized[self.x_normalized == self.norm_knee][0]

If you want to add it on #65 and update the test to assert that self.knee and self.knee_y are both None.

Probably should've bumped the version after adding the y functionality, so we can do it after this PR.

[tommilligan]

Thanks, that makes sense - I've updated the PR as you described. Thanks for keeping this up to date!

[arvkevi]

fixed in #65