ISOMAP invers mapping

[marcrocasalonso]

Dear Chris,

I have a question about the inverse transform of isomap. Do you have implemented any technique to return from the reduced space of ISOMAP to the input space?

Thank you in advance,
Regards
Marc

[chris-santiago]

Hi Marc,

Unfortunately, no. Because we're not just performing a matrix transformation (like PCA) there isn't a quick & easy way to invert transformed data to the original space. See original paper, here.

[marcrocasalonso]

Thank you Chris! I appreaciate your time!