lagplot()
- Description:
- Create a spatially lagged scatter plot, e.g. plot
z(s) versus z(s+h),
where h is a lag in a pairs object.
- Usage:
- lagplot(point.obj, pairs.obj, v1, v2=v1, lag=1, std=F, query.a,
xlim, ylim)
- 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
- lag: the lag to plot
- std: a logical variable indicating whether the data should be
standardized to their means and standard deviations before plotting
- 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
- xlim: a vector of length 2 indicating the x limits of the graphics page
- ylim: a vector of length 2 indicating the y limits of the graphics page
- 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:
- > lagplot(stations, stations.prs, 'inches')
- > lagplot(stations, stations.prs, 'inches', lag=4, query.a='id')
majure
Updated: 11-Dec-1995