Fig. 1.

Non-homogeneous metabolomics dataset merging problem. The puzzle pieces are used as a visual metaphor to represent metabolite features across datasets. Each puzzle piece corresponds to a specific metabolite, and its color indicates the identity of that metabolite. When two puzzle pieces are shown together (i.e., interlocked or adjacent), it visually represents that the corresponding metabolites are placed next to each other in a dataset. Each connected set of puzzle pieces represents a distinct dataset with the corresponding metabolite columns