[Octave-patch-tracker] [patch #10036] [octave forge] (statistics) Update function dendrogram

[anonymous]

URL:
  <https://savannah.gnu.org/patch/?10036>

                 Summary: [octave forge] (statistics) Update function
dendrogram
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Mon 01 Mar 2021 06:47:39 PM UTC
                Category: Forge : new feature
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: s.guidoni@virgilio.it
             Open/Closed: Open
         Discussion Lock: Any

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Details:

This patch improves a bit function dendrogram.

All the new features mimic the behaviour of the dendrogram function from
MATLAB.

Specify the maximum number of leaves to show:

P = 20;
dendrogram(tree, P); # the plot shows no more than 20 leaves, default is 30


Change the order of leaves:

order = optimalleaforder(tree, D);
dendrogram(tree, "Reorder", order); # the leaves are ordered according to
order


Change the orientation of the plot:

dendrogram(tree, "Orientation", "left"); # the plot is left to right


Get a handle to the plotted lines:

h = dendrogram(tree); # h is an array of handles


Get the numbers assigned to the leaves of the input tree:

[~,t] = dendrogram(tree); # t is a vector as long as the number of leaves of
tree


Get the order of the leaves as seen in the plot:

[~,~, permutation] = dendrogram(tree); # permutation is just the leaf order of
the plot


Not implemented:
* "CheckCrossing" to check the validity of the tree, e.g. when a custom leaf
order is given. I could add it in the future, by now just look at the
dendrogram.

* "ColorThreshold" to add a bit of colour to the clusters of the dendrogram: a
chore and, anyway, it can be done by changing the properties of the lines.

* "Labels" to change the labels of the plot: it can be done by changing the
properties of the axis.

Bonus: demo galore.



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File Attachments:


-------------------------------------------------------
Date: Mon 01 Mar 2021 06:47:39 PM UTC  Name: dendrogram.diff  Size: 14KiB  
By: None

<http://savannah.gnu.org/patch/download.php?file_id=50963>

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