geom_class function

Visualization in parallelels coordinates in matrix of each attribute

Visualization of the classes corresponding to each neuron of the SOM

geom_class(object_som, class = NULL, x_o = 3, y_o = 5.5, x_e = 3, y_e = 6.3)

Arguments

• object_som: object of Kohonen package
• class: categorical vector corresponding to the class of the dataset
• x_o: x-axis to map the number of observations of each neuron
• y_o: y-axis to map the number of observations of each neuron
• x_e: x-axis to map the entropy of each neuron
• y_e: y-axis to map the entropy of each neuron

Returns

ggplot2 object

Examples

# Creating SOM object
iris_som <- kohonen::som(X = as.matrix(iris[1:4]),
                         grid =  kohonen::somgrid(xdim = 5,
                                                   ydim = 5,
                                                   neighbourhood.fct = "gaussian",
                                                   topo = "rectangular"),
                         rlen = 100)

# Creating ggsom class plot
geom_class(iris_som, class = iris$Species,
           x_o = 1, y_o = 6,
           x_e = 1.1, y_e = 7.4)

References

ggplot2 package (https://CRAN.R-project.org/package=ggplot2)

Author(s)

Felipe Carvalho, lipecaso@gmail.com