plotHVT: Plot the hierarchical tessellations.

In HVT: Constructing Hierarchical Voronoi Tessellations and Overlay Heatmaps for Data Analysis

Plot the hierarchical tessellations.

Description

This is the main plotting function to construct hierarchical voronoi tessellations in 1D,2D or Interactive surface plot.

Usage

plotHVT(
  hvt.results,
  line.width = 0.5,
  color.vec = "black",
  centroid.size = 0.6,
  centroid.color = "black",
  child.level = 1,
  hmap.cols,
  separation_width = 7,
  layer_opacity = c(0.5, 0.75, 0.99),
  dim_size = 1000,
  plot.type = "2Dhvt",
  quant.error.hmap = NULL,
  cell_id = FALSE,
  cell_id_position = "bottom",
  cell_id_size = 2.6
)

Arguments

hvt.results	(1D/2DProj/2Dhvt/2Dheatmap/surface_plot) List. A list containing the output of trainHVT function which has the details of the tessellations to be plotted.
line.width	(2Dhvt/2Dheatmap) Numeric Vector. A vector indicating the line widths of the tessellation boundaries for each level.
color.vec	(2Dhvt/2Dheatmap) Vector. A vector indicating the colors of the boundaries of the tessellations at each level.
centroid.size	(2Dhvt/2Dheatmap) Numeric Vector. A vector indicating the size of centroids for each level.
centroid.color	(2Dhvt/2Dheatmap) Numeric Vector. A vector indicating the color of centroids for each level.
child.level	(2Dheatmap/surface_plot) Numeric. Indicating the level for which the plot should be displayed
hmap.cols	(2Dheatmap/surface_plot) Numeric or Character. The column number or column name from the dataset indicating the variables for which the heat map is to be plotted.
separation_width	(surface_plot) Numeric. An integer indicating the width between hierarchical levels in surface plot
layer_opacity	(surface_plot) Numeric. A vector indicating the opacity of each hierarchical levels in surface plot
dim_size	(surface_plot) Numeric. An integer controls the resolution or granularity of the 3D surface grid
plot.type	Character. An option to indicate which type of plot should be generated. Accepted entries are '1D','2Dproj','2Dhvt','2Dheatmap'and 'surface_plot'. Default value is '2Dhvt'.
quant.error.hmap	(2Dheatmap) Numeric. A number representing the quantization error threshold to be highlighted in the heatmap. When a value is provided, it will emphasize cells with quantization errors equal or less than the specified threshold, indicating that these cells cannot be further subdivided in the next depth layer. The default value is NULL, meaning all cells will be colored in the heatmap across various depths.
cell_id	(2Dhvt/2Dheatmap) Logical. A logical indicating whether the cell IDs should be displayed
cell_id_position	(2Dhvt/2Dheatmap) Character. A character indicating the position of the cell IDs. Accepted entries are 'top' , 'bottom', 'left' and 'right'.
cell_id_size	(2Dhvt/2Dheatmap) Numeric. A numeric vector indicating the size of the cell IDs for all levels.

Value

plot object containing the visualizations of reduced dimension(1D/2D) for the given dataset.

Author(s)

Shubhra Prakash <[e-mail]>, Sangeet Moy Das <[e-mail]>, Vishwavani <[e-mail]>

See Also

trainHVT

Examples

data("EuStockMarkets")
hvt.results <- trainHVT(EuStockMarkets, n_cells = 60, depth = 1, quant.err = 0.1, 
                       distance_metric = "L1_Norm", error_metric = "max",
                       normalize = TRUE,quant_method="kmeans")
                       
#change the 'plot.type' argument to '2Dproj' or '2DHVT' to visualize respective plots.                      
plotHVT(hvt.results, plot.type='1D')

#change the 'plot.type' argument to 'surface_plot' to visualize the Interactive surface plot                   
plotHVT(hvt.results,child.level = 1, 
hmap.cols = "DAX", plot.type = '2Dheatmap')

HVT documentation built on April 3, 2025, 8:45 p.m.