aspace: A collection of functions for estimating centrographic statistics and computational geometries for spatial point patterns

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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 <ron.buliung@utoronto.ca>
License
GPL (>= 2)
Version
3.2

View on CRAN

Man pages

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

Files in this package

aspace
aspace/MD5
aspace/R
aspace/R/tan_d.R
aspace/R/sin_d.R
aspace/R/plot_sde.R
aspace/R/plot_sdd.R
aspace/R/plot_centres.R
aspace/R/plot_box.R
aspace/R/median_centre.R
aspace/R/mean_centre.R
aspace/R/distances.R
aspace/R/cos_d.R
aspace/R/CMD.R
aspace/R/CF2PTS.R
aspace/R/CF.R
aspace/R/calc_sde.R
aspace/R/calc_sdd.R
aspace/R/calc_box.R
aspace/R/atan_d.R
aspace/R/as_radians.R
aspace/R/asin_d.R
aspace/R/acos_d.R
aspace/NAMESPACE
aspace/man
aspace/man/wts.Rd
aspace/man/tan_d.Rd
aspace/man/sin_d.Rd
aspace/man/r.SDE.Rd
aspace/man/r.SDD.Rd
aspace/man/r.BOX.Rd
aspace/man/plot_sde.Rd
aspace/man/plot_sdd.Rd
aspace/man/plot_centres.Rd
aspace/man/plot_box.Rd
aspace/man/median_centre.Rd
aspace/man/mean_centre.Rd
aspace/man/distances.Rd
aspace/man/cos_d.Rd
aspace/man/CMD.Rd
aspace/man/CF2PTS.Rd
aspace/man/CF.Rd
aspace/man/centre.Rd
aspace/man/calc_sde.Rd
aspace/man/calc_sdd.Rd
aspace/man/calc_box.Rd
aspace/man/atan_d.Rd
aspace/man/as_radians.Rd
aspace/man/aspace.package.Rd
aspace/man/asin_d.Rd
aspace/man/activities2.Rd
aspace/man/activities.Rd
aspace/man/acos_d.Rd
aspace/DESCRIPTION
aspace/data
aspace/data/wts.rda
aspace/data/r.SDE.RData
aspace/data/r.SDD.RData
aspace/data/r.BOX.RData
aspace/data/centre.rda
aspace/data/activities2.rda
aspace/data/activities.rda