Plotly Create_Dendogram()

A dendrogram is a specific type of plot represented as a tree. It is commonly used in hierarchical data that allows you to visualize the data as a hierarchy.

We can use the create_dendrogram() function from the Plotly.figure_factory to create a dendrogram plot.

Plotly.figure_factory.create_dendrogram()

The function provides a syntax as shown in the following:

The parameter functionality is as follows:

1. x – Specifies the matrix of observations as an array of arrays.
2. orientation – Sets the orientation of the plot. Accepted values include:
   1. ‘top’
   2. ‘right’
   3. ‘bottom’
   4. ‘left’
3. colorscale – Sets a colorscale for the dendrogram figure.
4. distfun – Represents the function used to calculate the pairwise distance from the observations.
5. linkagefun – Sets the function to determine the linkage matrix from the pairwise distance.
6. hovertext – Sets the hover text for the traces of the dendrogram cluster.
7. color_threshold – Defines the value used to make the separation of the clusters.

Example 1:

The following code shows how to create a simple dendrogram tree with the orientation set to bottom.

The previous code returns a dendrogram plot as in the following figure:

You can change the orientation to any value that suits your needs.

Example 2:

You can also set the labels for the dendrogram by specifying the labels parameter.

Output:

Conclusion:

This article covers the basics of creating a dendrogram figure in Plotly.