| arclength | Calculate features from graph |
| -vdata <nodes> | graph nodes |
| -edata <arcs> | graph arcs |
| -fout <distr> | output distribution |
| -dout <feats> | data frame containing calculated features |
| [-val < -3 | -2 | -1 | gray > ] | considered arcs |
This command uses a graph defined by nodes and arcs to calculate features based on lengths of arcs. Distribution of arc lengths is saved in field distr and mean, variance, skewness, kurtosis and entropy are stored in data frame feats. Option -val specifies arcs taken into account. If value is zero or positive, only arcs connecting two points with specified color are taken into account. Values -1, -2 and -3 use arcs connecting points that have different color, same color and any color, respectively. Default value is -3.
Example: If nodes and arcs define a graph, following commands plot the length distribution of all arcs.
... # Calculate length distribution NDA> arclength -vdata nodes -edata arcs -fout distr \ -dout features -val -3 # Plot the distribution NDA> mkgrp g NDA> ldgrv g -f distr -co black NDA> show g