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title: "Bitmap cubical complex"
meta_title: "cubicalcomplex"
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## cubical_complex_persistence ##
This program computes persistent homology, by using the Bitmap_cubical_complex class, of cubical complexes provided in text files in Perseus style.
See [here](http://gudhi.gforge.inria.fr/doc/latest/fileformats.html#FileFormatsPerseus) for a description of the file format.

**Example**

```
   cubical_complex_persistence data/bitmap/CubicalTwoSphere.txt
```

* Creates a Cubical Complex from the Perseus style file `CubicalTwoSphere.txt`,
computes Persistence cohomology from it and writes the results in a persistence file `CubicalTwoSphere.txt_persistence`.

## periodic_cubical_complex_persistence ##

Same as above, but with periodic boundary conditions.

**Example**

```
   periodic_cubical_complex_persistence data/bitmap/3d_torus.txt
```

* Creates a Periodical Cubical Complex from the Perseus style file `3d_torus.txt`,
computes Persistence cohomology from it and writes the results in a persistence file `3d_torus.txt_persistence`.