Fig. 1
From: Parametric and non-parametric gradient matching for network inference: a comparison
Gene regulatory network (GRN) schematics with four genes and four interactions. Three representations of the same GRN are shown. a Undirected graph showing interactions between genes: 1, 2; 1, 3; 2, 3; 2, 4. b Directed graph showing interactions between genes (parent node stated first): 1, 2; 1, 3; 3, 2; 2, 4. c Directed graph showing interactions between genes: 1 activates 2; 1 activates 3; 3 activates 2; 2 represses 4