rotation.discrepancy edit page

discrepancy between weighted orientation sets or a rotational density

Syntax

d = discrepancy(ori1,ori2,'metric','D_2')
[d,info] = discrepancy(ori1,ori2,'metric','D_ball','numCenters',4097)
d = discrepancy(ori1,ori2,'metric','L2','bandwidth',16)
d = discrepancy(ori1,ori2,'weights',c,'weights2',d,'metric','D_2')
d = discrepancy(ori,f,'weights',c,'metric','D_2')

Point weights are nonnegative and normalized independently to mass one. An orientation set paired with a density is scaled to the density's integral, and keeps mass one if that integral vanishes. A symmetric orientation splits its mass uniformly over the orbit of symmetrically equivalent rotations. D_2 is the standard root ball L2 discrepancy, evaluated without truncating atomic measures and counting a difference in total mass. L2 is the root bandlimited norm. Use 'squared' for their squares. D_ball is a finite ball-search approximation over a three dimensional space; info.isExact is false and the estimate needs refinement to settle. 'kernel' is the historical squared truncated optimization objective and takes two densities of equal integral only. See SO3Fun/discrepancy for all options and normalization conventions.

See also

SO3Fun.discrepancy SO3Fun.optimalSample

Citing this page. This page is part of the documentation of MTEX, a free and open source MATLAB toolbox for analyzing and modeling crystallographic textures. It was written by The MTEX Developers and is published at https://mtex-toolbox.github.io/rotation.discrepancy.html. If you use MTEX, or reuse text or figures from this page, in your research, please cite

F. Bachmann, R. Hielscher, H. Schaeben: Texture Analysis with MTEX - Free and Open Source Software Toolbox, Solid State Phenomena 160 (2010), 63-68. 10.4028/www.scientific.net/SSP.160.63

BibTeX 
@article{bachmann2010mtex,
  author  = {F. Bachmann and R. Hielscher and H. Schaeben},
  title   = {Texture Analysis with MTEX - Free and Open Source Software Toolbox},
  journal = {Solid State Phenomena},
  volume  = {160},
  pages   = {63-68},
  year    = {2010},
  doi     = {10.4028/www.scientific.net/SSP.160.63},
  url     = {https://doi.org/10.4028/www.scientific.net/SSP.160.63}
}

Other papers describing specific MTEX methods are listed under Publications — please cite the one that best fits your application. The MTEX source code is licensed under the GNU General Public License v2.0; the text and figures of this documentation are licensed under CC BY 4.0, which permits reuse — including by automated systems — provided The MTEX Developers and this page are credited.