psda (version 1.4.0)

psymbolic: Polygonal Symbolic Data

Description

The function obtain a symbolic polygonal variables from data of class 'paggregated', i.e aggregated data. For this, the researcher need to select the number of vertices.

Usage

psymbolic(pdata, vertices)

Arguments

pdata

an object of the class 'paggregated' that represents the representation of symbolic polygonal data.

vertices

the number of vertices for the polygon.

Value

psdata is an object of class 'polygonal-variables', i.e. an environment, where for each object in the environment is a list with the polygons(matrix with dimention l times 2, where l represents the number of vertices).

Details

psymbolic converts data represented by center and radius representation in symbolic polygonal data. It is importat that the researcher considers a positive number for radius. Besides, the variable vertices should be greater than 2 for the number of vertices.

When the object of class 'paggregated' is composed by a vector for center and one vector for radius a simple symbolic variable is obtained.

Examples

# NOT RUN {
## Obtaining a simple symbolic polygonal variable
cat1 <- as.factor(sample(1:20, 1000, replace = TRUE))
cv1 <- runif(1000) #classical variable
cvc1 <- data.frame(category = cat1, variable = cv1) 
pol1 <- paggreg(cvc1)
out <- psymbolic(pol1, 6) #Hexagon
out$X1

## Obtaining three (or more) symbolic polygonal variables
cat2 <- as.factor(sample(1:20, 1000, replace = TRUE))
cv2 <- matrix(runif(3000), ncol = 3) #classical variable
cvc2 <- data.frame(category = cat2, cv2) 
pol2 <- paggreg(cvc2)
out2 <- psymbolic(pol2, 8) #Octagon
out2$X1
out2$X2
out2$X3 
# }