Hi, I have a question about purging. After filtering out certain vertices using set_vertex_filter, I want to remove all filter vertices. However, after removing them by calling the purge_vertices function, the property maps for the vertices doesn't seem to line up anymore. For example: Initial Graph: with vertex and property map Vertex Property Map V1: 1 Filtered V2: 2 Filtered V3: 3 Not Filtered V4: 4 Not Filtered After calling purge I see Vertex Property Map V3: 1 V4: 2 This is not correct because V3's mapping is 3 and not 1. Is there a simple fix to this issue or a suitable workaround without having to go back and relabel all the property maps. Thanks. -- View this message in context: http://main-discussion-list-for-the-graph-tool-project.982480.n3.nabble.com/... Sent from the Main discussion list for the graph-tool project mailing list archive at Nabble.com.