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File formats
############
Persistence Diagram
*******************
Such a file, whose extension is usually ``.pers``, contains a list of
persistence intervals.
Lines starting with ``#`` are ignored (comments).
Other lines might contain 2, 3 or 4 values (the number of values on each line
must be the same for all lines)::
[[field] dimension] birth death
Here is a simple sample file::
# Persistence diagram example
2 2.7 3.7
2 9.6 14.
# Some comments
3 34.2 34.974
4 3. inf
Other sample files can be found in the data/persistence_diagram folder.
Such files can be generated with
:meth:`gudhi.SimplexTree.write_persistence_diagram`, read with
:meth:`gudhi.read_persistence_intervals_grouped_by_dimension`, or
:meth:`gudhi.read_persistence_intervals_in_dimension` and displayed with
:meth:`gudhi.plot_persistence_barcode` or
:meth:`gudhi.plot_persistence_diagram`.
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