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tdaverse/tdaunif
Latin hypercube sampling for remainders

For cases of stratified sampling in which the sample size n is not divisible by the number of cells N in an area-preserving grid, it may be desirable to offer an option to allocate the remainder using ...
enhancement
  • corybrunson
  • Opened 
    on Jun 23, 2022
  • #31

tdaverse/tdaunif
standard simplex sampler

By sampling from the vertices of an n-dimensional standard simplex, optionally with (but by default without) the origin, adding noise yields, in effect, a Gaussian cluster sampler. Such a sample from the ...
enhancement
  • corybrunson
  • Opened 
    on Sep 13, 2021
  • #30

tdaverse/tdaunif
higher-genus tori

I m unable to get samples from an interlocked torus, from either the CRAN version or the github: tdaunif::sample_tori_interlocked(100) # Error in rbind(res_1, res_2): number of columns of matrices must ...
enhancement
  • peekxc
  • 2
  • Opened 
    on Nov 28, 2020
  • #29

tdaverse/tdaunif
use roxygen2 family tags to link among samplers

For the time being, there are few enough samplers that it would be feasible to tag @familys of rejection samplers and of volume-preserving samplers, though eventually these might need to be subfamilied. ...
good first issue
  • corybrunson
  • Opened 
    on Oct 18, 2020
  • #28

tdaverse/tdaunif
spherical triangles

Arvo (1995, 2001) illustrates area-preserving parameterization–based sampling using spherical triangles. We implemented planar triangle samplers here and it would be natural to include sphericals as well. ...
enhancement
good first issue
  • corybrunson
  • Opened 
    on Oct 16, 2020
  • #27

tdaverse/tdaunif
more lemniscates

There are lots of lemniscates, and it would be cool to see which of their parameterizations are amenable to length-preserving transformations.
enhancement
good first issue
  • corybrunson
  • Opened 
    on Oct 16, 2020
  • #26

tdaverse/tdaunif
samples from compact matrix groups

If not already implemented elsewhere, it may be worthwhile to write samplers for compact Lie groups, as presented in accessible form by Mezzadri (2007; p. 592) (arXiv preprint). The technique can also ...
enhancement
  • corybrunson
  • Opened 
    on Sep 22, 2020
  • #24

tdaverse/tdaunif
ellipse sampler

Samples obtained from the circle samplers cannot have their aspect ratios adjusted in an area-preserving way; instead, they should be replaced with ellipse samplers that use aspect ratio parameters that ...
  • corybrunson
  • 1
  • Opened 
    on Sep 18, 2020
  • #23

tdaverse/tdaunif
scale function and parameter

By design, the samplers have no scaling parameters; the only parameters that affect the underlying manifold from which points are sampled have to do with aspect ratios, and aspect ratio parameters that ...
wontfix
  • corybrunson
  • 1
  • Opened 
    on Sep 18, 2020
  • #22

tdaverse/tdaunif
vignette(s)

The package needs at least one vignette; for the time being, one may be enough to illustrate the three basic functionalities: - uniform sampling (e.g. the real projective plane, perhaps also projected ...
enhancement
  • corybrunson
  • 1
  • Opened 
    on Sep 4, 2020
  • #21
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