dataCOV: Example data file

In SPODT: Spatial Oblique Decision Tree

Description

Simulated data for SPODT functions. To assess the SpODT algorithm to detect 6 situations evoluting through time: rotated square cluster (2 situations), no cluster (2 situations), and V-border shapes (2 situations).

Usage

data(dataCOV)

Format

A data frame with 1800 observations on the following 6 variables (300 locations).

i

a numeric vector

x

a numeric vector

y

a numeric vector

z

a numeric vector

V1

a numeric vector

V2

a factor with levels ("sq2", "sq1.5", "sq0", "v0", "v1.5", "v2")

Details

• i: identification of each localization.

• x: longitudinal coordinate.

• y: latitudinal coordinate.

• z: the dependant variable.

• V1: a numeric cofactor (1 to 6) to be split according to a non oblique algorithm.

• V2: a qualitative variable to be split according to a non oblique algorithm (6 levels).

References

• Gaudart J, Graffeo N, Coulibaly D, Barbet G, Rebaudet S, Dessay N, Doumbo O, Giorgi R. SPODT: An R Package to Perform Spatial Partitioning. Journal of Statistical Software 2015;63(16):1-23. http://www.jstatsoft.org/v63/i16/

• Gaudart J, Poudiougou B, Ranque S, Doumbo O. Oblique decision trees for spatial pattern detection: optimal algorithm and application to malaria risk. BMC Medical Research Methodology 2005;5:22

• Gaudart J, Giorgi R, Poudiougou B, Toure O, Ranque S, Doumbo O, Demongeot J. Detection de clusters spatiaux sans point source predefini: utilisation de cinq methodes et comparaison de leurs resultats. Revue d'Epidemiologie et de Sante Publique 2007;55(4):297-306

• Fichet B, Gaudart J, Giusiano B. Bivariate CART with oblique regression trees. International conference of Data Science and Classification, International Federation of Classification Societies, Ljubljana, Slovenia, July 2006.

Examples

#data(dataCOV)
#dataset<-dataCOV
#coordinates(dataset)<-c("x","y")
#coordinates are planar ones
#Example : split the area with a covariable analysis
#sp<-spodt(dataset@data$z~V1, dataset, weight=FALSE, graft=0, 
#         min.ch=150, min.parent=200, level.max=3, rtwo.min=0.15)
#spodt.tree(sp)

SPODT documentation built on May 2, 2019, 9:43 a.m.