homology.PersDiag.transform

PersDiag.transform(transform=None, points=None)

Produce an array of points, obtained by transforming the persistence diagram.

If transform==None [default], then we leave the diagram alone. (birth, death) If transform==”project”, then we project the diagram so that (birth, death) –> (birth, death-birth) = (birth, pers) If transform==”rotate”, then we rotate-and-rescale so that (birth, death) –> ( (death+birth)/2, (death-birth)/2 ) If transform is a 2x2 array, apply it.

If provided with an array “points”, transform that instead of the diagram.