This is a test-data generator for algorithms which determine the MST of weighted, undirected graphs.
Just choose a number of nodes and click "Generate" at the bottom. Then, click on the output to highlight it, and press ctrl+c to copy it.
The MST output will appear in a separate box next-to or below the main output box. It lists the arcs/edges of the MST in the format "[(vertex1 vertex2 weight)]".
Things to note about the output:
Number of Nodes/Vertices (between 1 and 100):