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Diffstat (limited to 'src/Cech_complex/utilities/cechcomplex.md')
| -rw-r--r-- | src/Cech_complex/utilities/cechcomplex.md | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/Cech_complex/utilities/cechcomplex.md b/src/Cech_complex/utilities/cechcomplex.md index 821e4dad..54c4e88d 100644 --- a/src/Cech_complex/utilities/cechcomplex.md +++ b/src/Cech_complex/utilities/cechcomplex.md @@ -26,18 +26,24 @@ a prime number). **Usage** -`cech_persistence [options] <OFF input file>` +`cech_persistence [options] <input OFF file>` + +where +`<input OFF file>` is the path to the input point cloud in +[nOFF ASCII format]({{ site.officialurl }}/doc/latest/fileformats.html#FileFormatsOFF). **Allowed options** * `-h [ --help ]` Produce help message * `-o [ --output-file ]` Name of file in which the persistence diagram is written. Default print in standard output. -* `-r [ --max-edge-length ]` (default = inf) Maximal length of an edge for the Čech complex construction. +* `-r [ --max-radius ]` (default = inf) Maximal radius for the Čech complex construction. * `-d [ --cpx-dimension ]` (default = 1) Maximal dimension of the Čech complex we want to compute. * `-p [ --field-charac ]` (default = 11) Characteristic p of the coefficient field Z/pZ for computing homology. * `-m [ --min-persistence ]` (default = 0) Minimal lifetime of homology feature to be recorded. Enter a negative value to see zero length intervals. +* `-e [ --exact ]` for the exact computation version. +* `-f [ --fast ]` for the fast computation version. -Beware: this program may use a lot of RAM and take a lot of time if `max-edge-length` is set to a large value. +Beware: this program may use a lot of RAM and take a lot of time if `max-radius` is set to a large value. **Example 1 with Z/2Z coefficients** |