I have a series of Output Area centroids and I want to create a matrix of lines between each point (every point connected to every point), which is effectively what the distance matrix tool does (I think). But I also need the line geometry for visualisation purposes. Can anyone tell me how to do this?
With polygons, you can use the plugin "conefor" (you can convert point to polygon with a buffer and dont activ the option "edge distance")
With points, may be you can use the plugin "MMQGIS". You have here a tutorial that can help : hub line