Fix bug with new grid
Start adding condensed data structure
Fleshing out condensed methods
Remove old summary obj
Rename grouped to bin
1d piece of smooth_nd
Better error message for incorerect vars
Update smoothing notes
Better function name
First pass at smoothing strategies.
Code compiles only. Not tested
Using floating point abs
Extract loess into own function
simpleRobustRegression improvements
* better name
* small b cutoff
* fabs instead of abs
Tests for simple and robust regressions
More optimisation notes
Better median implementation.
Courtesy of @jjallaire
Naive smooth_nd
Add nd smooth function.
And update docs
Remove old 1 & 2d smoothers
Fix failing tests after API changes