Is dimensionality reduction reversible?

Question

I have implemented a dimentionality reduction algorithm using ENCOG, that takes a dataset (call it A) with multiple features and reduces it to a dataset (B) with only one feature (I need that for time series analisys).

Now my question is, I have a value from B - predicted by the time series analysis, can I convert it back to two dimensions like in the A dataset?

Answer 1

No, dimensionality reduction is not reversible in general. It loses information.