A collection of functions for computing centrographic statistics (e.g., standard distance, standard deviation ellipse, standard deviation box) for observations taken at point locations. Separate plotting functions have been developed for each measure. Users interested in writing results to ESRI shapefiles can do so by using results from aspace functions as inputs to the convert.to.shapefile and write.shapefile functions in the shapefiles library. The aspace library was originally conceived to aid in the analysis of spatial patterns of travel behaviour (see Buliung and Remmel, 2008). Major changes in the current version include (1) removal of dependencies on several external libraries (e.g., gpclib, maptools, sp), (2) the separation of plotting and estimation capabilities, (3) reduction in the number of functions, and (4) expansion of analytical capabilities with additional functions for descriptive analysis and visualization (e.g., standard deviation box, centre of minimum distance, central feature).
|Author||Randy Bui, Ron N. Buliung, Tarmo K. Remmel|
|Date of publication||2012-08-14 12:37:42|
|Maintainer||Ron N. Buliung <email@example.com>|
|License||GPL (>= 2)|
acos_d: Compute inverse cosine with angle given in degrees
activities: Demo Data: x and y coordinates of 10 specified point...
activities2: Demo Data: x and y coordinates of 10 specified point...
asin_d: Compute inverse sine with angle given in degrees
aspace.package: A collection of functions for estimating centrographic...
as_radians: Converts degrees to radians
atan_d: Compute inverse tangent with angle given in degrees
calc_box: Calculate the Standard Deviation Box
calc_sdd: Calculate the Standard Distance Deviation (Standard Distance)
calc_sde: Calculate the Standard Deviation Ellipse
centre: Demo Data: Coordinates of a single source, centre, location
CF: Central Feature (CF) Calculator
CF2PTS: Central feature between 2 point patterns (CF2PTS) Calculator
CMD: Centre of Minimum Distance (CMD) Calculator
cos_d: Compute cosine with angle given in degrees
distances: Multiple Euclidean distance calculator
mean_centre: Mean Centre Calculator
median_centre: Median Centre Calculator
plot_box: Plot the Standard Distance Box
plot_centres: Plot centres
plot_sdd: Plot the Standard Distance Deviation (Standard Distance)
plot_sde: Plot the Standard Deviation Ellipse
r.BOX: Demo Data: Standard Deviation Box Output Object
r.SDD: Demo Data: Standard Deviation Distance Output Object
r.SDE: Demo Data: Standard Deviation Ellipse Output Object
sin_d: Compute sine with angle given in degrees
tan_d: Compute tangent with angle given in degrees
wts: Weights vector