Mercurial > octave
view examples/data/README @ 31248:8b75954a4670
delaunayn: adjust node ordering for positive outward normal vectors (bug #53397)
* delaunayn.m: Check sign of simplex volume, flip node order for negative
volumes to ensure positive (outward-pointing) normal vectors. Add BISTs to
check for positive volumes.
* etc/News.8.md: Append function improvement note to delaunayn change
paragraph under General Improvements.
author | Nicholas R. Jankowski <jankowski.nicholas@gmail.com> |
---|---|
date | Thu, 29 Sep 2022 23:09:05 -0400 |
parents | c2c528319260 |
children |
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* penny data file: See the discussion here: https://savannah.gnu.org/patch/?func=detailitem&item_id=8472 * west0479 data file: Chemical engineering plant models Eight stage column section, all rigorous from set CHEMWEST, from the Harwell-Boeing Collection. west0479.mtx: original file obtained from from https://math.nist.gov/MatrixMarket/data/Harwell-Boeing/chemwest/west0479.html west0479.mat: generated from west0479.mtx as follows: x = load ("west0479.mtx"); nr = x(1,1); nc = x(1,2); i = x(2:end,1); j = x(2:end,2); sv = x(2:end,3); west0479 = sparse(i, j, sv, nr, nc); save -text west0479.mat west0479 Note that the original file has 1910 entries but 22 of them are exact zeros: 384 86 0.0000000000000e+00 360 116 0.0000000000000e+00 361 117 0.0000000000000e+00 362 118 0.0000000000000e+00 238 224 0.0000000000000e+00 239 225 0.0000000000000e+00 240 226 0.0000000000000e+00 250 240 0.0000000000000e+00 251 241 0.0000000000000e+00 252 242 0.0000000000000e+00 272 259 0.0000000000000e+00 273 260 0.0000000000000e+00 274 261 0.0000000000000e+00 294 278 0.0000000000000e+00 295 279 0.0000000000000e+00 296 280 0.0000000000000e+00 316 297 0.0000000000000e+00 317 298 0.0000000000000e+00 318 299 0.0000000000000e+00 338 316 0.0000000000000e+00 339 317 0.0000000000000e+00 340 318 0.0000000000000e+00 These are not explicitly included in the west0479.mat file.