spacecloud()
- Description:
- Create a scatter plot of square-root or squared differences
between variable values at pairs of points versus the distance between
the points.
- Usage:
- spacecloud(point.obj, pairs.obj, v1, v2=v1, type='r', query.a)
- Required arguments:
- point.obj: a point object generated by point()
- pairs.obj: a pairs object generated by pairs()
- v1: a variable to plot
- Optional arguments:
- v2: an optional variable name, if entered the plot will be created
between v1 and v2
- type: either 'r' for square-root differences or 's' for
squared differences
- query.a: an optional variable name, if entered, the value of the
variable will be displayed on the graphics device for points identified by the user
- Value:
- NULL
- Notes:
- When query.a is entered, the user will be prompted to identify points on
the display device. Because each point in the plot represents a pair of locations, the user
must identify each point twice, once for the "from" point and once for the "to" point.
Querying is ended by pressing the middle mouse button on the mouse while the cursor is
in the display window.
- Examples:
- > spacecloud(stations, stations.prs, 'inches')
- > spacecloud(stations, stations.prs, 'inches', query.a='id')
majure