7 Components: the Function Pages - Developers

%HIDECOMMENTS% Activates or deactivates the option of including
comments in the presentation
Example: Set HIDECOMMENTS =
on
21.4
Generating Visuals for Statistics using Diagrams
(Chart Plugin)
Diagrams are irreplaceable in providing visualization. The depiction
of trends and statistics are essential in projects, including our conference.
Perhaps you wish to portray the number of visitors over the
course of the conference, for instance. Now that we are nearing the
end of our Wiki project, we would like to present the Chart Plugin. It
can be used to generate very simple diagrams in the wiki.
This plugin provides a function that is often familiar from
spreadsheets: The program generates a diagram based on the identified
database.
In the TWiki, the database consists of a table that by default
should be in the same topic. However, there is also the option of citing
tables from other pages. There are five different types of diagrams
that can be selected, which can also be combined with each
other. Furthermore, it is possible to set several diagram parameters,
such as the color combinations. The generated diagram is created in
jpeg or png format. All diagrams on a page are located in the open
folder of the corresponding web. Thus, others also have access to the
diagrams.
Note: For the Chart plugin, you will also need the additional Perl
module GD. You also have to install it retroactively with CPAN.
GD, in turn, requires the graphic library gdlib to be in your system.
You can obtain further information at http://www.boutell.com/gd/.
21.4.1
Syntax
To generate a diagram on a page, insert the variable
%CHART{...}% in the appropriate spot. The diagram type, data
source and diagram attributes are to be defined inside the curly
brackets.
21.4 Generating Visuals for Statistics using Diagrams
(Chart Plugin)
Statistics
Mode of
operation
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