The TreeMap command generates a tree map for the specified data. A tree map is a method of data visualization using nested rectangles, in which the area of a rectangle corresponds to the the magnitude of the corresponding datum.

The first parameter X is a list or Vector of equations; the left-hand side of each equation specifies a value and the right-hand side the associated frequency.

The right-hand side of an input equation can also contain another list or Vector of values; this imposes a hierarchical ordering on the data.

The options argument can contain one or more of the options shown below. All unrecognized options will be passed to the plots[display] command. See plot/options for details.

color=name, list, or range

This option specifies colors for the individual data sets. When a list of colors is given, each of the rectangles will be colored with the corresponding color in the list. If a range of colors is given, the colors will be generated by selecting an appropriate number of equally spaced points in the corresponding hue range.

datasetlabels=default, none, relative, absolute, or list

This option controls data set labels on the tree map rectangles. By default, TreeMap uses data values as labels. The relative option will display, for each rectangle, the percentage value that rectangle occupies in the overall rectangle. The absolute option will display, for each rectangle, the absolute frequency of the corresponding value. Finally, one can specify data set labels as a list of strings.

$\mathrm{with}\left(\mathrm{Statistics}\right)\:$

$\mathrm{TreeMap}\left(\left[''A''=6\,''B''=6\,''D''=4\,''E''=3\,''F''=2\,''G''=2\,''H''=1\right]\right)$

$T≔\left[\mathrm{StringTools}:-\mathrm{CharacterFrequencies}\left(''honorificabilitudinitatibus''\right)\right]$

$T≔\left[''a''=2\,''b''=2\,''c''=1\,''d''=1\,''f''=1\,''h''=1\,''i''=7\,''l''=1\,''n''=2\,''o''=2\,''r''=1\,''s''=1\,''t''=3\,''u''=2\right]$

$\mathrm{TreeMap}\left(T\,\mathrm{color}=''Crimson''..''Gold''\right)$

$\mathrm{TreeMap}\left(\left[''Fruits''=\left[''Apples''=2\,''Bananas''=2\,''Oranges''=5\right]\,''Vegetables''=\left[''Carrots''=3\,''Potatoes''=3\right]\,''Eggs''=12\right]\right)$

$\mathrm{CanadaPopulation}≔\left[''AB''=4121.7\,''BC''=4631.3\,''NL''=527.0\,''PE''=146.3\,''MB''=1282.0\,''NB''=753.9\,''NT''=43.6\,''NS''=942.7\,''NU''=36.6\,''ON''=13678.7\,''QC''=8214.7\,''SK''=1125.4\,''YT''=36.5\right]\:$

$\mathrm{TreeMap}\left(\mathrm{CanadaPopulation}\,\mathrm{color}=\mathrm{blue}..\mathrm{red}\,\mathrm{size}=\left[900\,400\right]\right)$

$\mathrm{with}\left(\mathrm{FileTools}\right)\:$

$\mathrm{VideoList}≔\mathrm{Size}\left(\mathrm{JoinPath}\left(\left[''videos''\right]\,\mathrm{base}=\mathrm{datadir}\right)\,\mathrm{recursive}\,\mathrm{depth}=1\right)$

$\mathrm{VideoList}≔\left[''/maple/cbat/active/268342/data/videos/videoplayer.mp4''=3343432\,''/maple/cbat/active/268342/data/videos/world.mp4''=3139798\right]$

$\mathrm{VideoList}≔\mathrm{evalindets}\left(\mathrm{VideoList}\,\mathrm{string}\,\mathrm{Filename}\right)$

$\mathrm{VideoList}≔\left[''videoplayer.mp4''=3343432\,''world.mp4''=3139798\right]$

$\mathrm{TreeMap}\left(\mathrm{VideoList}\right)$

The Statistics[TreeMap] command was introduced in Maple 2015.

For more information on Maple 2015 changes, see Updates in Maple 2015.