This paper from the group fmr (flux, matrices, networks) focuses on the graphical representation of matrices and its implementation to represent the major networks in social sciences. It concerns the visualization of relational data (nodes, links) in the form of flow graph and map flows. It focuses in particular on valued graphs. The difference between the two processes (graph and flow map) is related to the consideration of constraints nodal position and the necessary selection of links based on the total share of interaction represented.Ce document du groupe fmr (flux, matrices, réseaux) porte sur la représentation graphique des matrices et sa mise en pratique pour représenter les grands réseaux en sciences sociales. Il intéresse les cham...