plot grouped data in R

The data: You can use the excellent ggplot2 package for easy plotting: Here, I used facet_wrap to create facets for each group. In principle this is not necessary, since the groups’ points can be distinguished by their colour. But in this case there are only three different locations at the figure. Hence, not all points … Read more

Understanding Time complexity calculation for Dijkstra Algorithm

Dijkstra’s shortest path algorithm is O(ElogV) where: V is the number of vertices E is the total number of edges Your analysis is correct, but your symbols have different meanings! You say the algorithm is O(VElogV) where: V is the number of vertices E is the maximum number of edges attached to a single node. Let’s rename your E to N. So one analysis says O(ElogV) and another … Read more