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3D Pie Charts
Pie
charts are circle plots divided into pieces, each
piece showing
the size of some related portion of information. These charts
are used to
display the sizes of parts that make up some whole.

In Matlab, the expression 'pie3(V)'
draws a 3D pie using
the data in V.
Each element in V
is represented as a slice (with a %) in the plot.

You can type ' help pie3
' on your command window to see the full description and possibilities
of this instruction.
We show you here two simple 3Dplotting examples.
Example
1: Display a vector with a 3D chart
We have some information
in a vector
'p'. We want to display the percentage of that information with a 3D
chart. The values in the vector are not displayed themselves, only
their correspondig percentages.
p = [3.3
2.6 .69 .4 .3];
pie3(p)
title('Interesting
Chart')
results in:
In the expression 'pie3(V,
explode, labels)', 'explode'
specifies whether to separate a slice from the center of the plot.
V(i,j)
is apart from the center of the pie plot if explode(i,j) is
nonzero. 'explode'
must be the same size as V.
'labels'
specifies text labels for the slices. The number of labels must equal
the number of elements in V.
Example
2: add labels to charts
In this case we have some values in a vector named 'd'. We want to
display the 3D pie including neither the values nor the percentages,
but an associated label to each portion.
d = [1 2
3 2.5];
pie3(d,
[1 0 1 0],...
{'Label 1', 'Label 2', 'Label 3', 'Label
4'})
title('Pie
Chart showing explosions...')
results in:
From
'Pie Charts' to home
From
'Pie Charts'
to '3D plot Menu'


