Tip 25. Radar- diagram
Fig
25. Radar-diagram
For
visualization of tabular data it is convenient to use special type of
business-graphic[1] – radar-diagram: rays are drown for the center, on which marks are
made that. The marks are situated within range from the center, which is
proportional to the elements of traced vector; then the marks are drawn by
straight lines. We get the polygon, which square and form reflects properties
of some object, process or phenomenon.
The
results of visualization of the data, which keep in the matrix Ì, via radar-diagram are showed in the fig. 25. The main point of the problem: nine
experts are invited for some ten
qualities rating of one or another object.
They are able to estimate from 2
(unsatisfactory) till 5 (excellent mark). On the radar-diagram (but it is
nothing but polar graph of Mathcad) the regular polygon is
mean mark, which was put down by the experts but the irregular polygon is mean
mark for separate qualities: one can see at once where weak «strong» places of
the test object using the vertex deviation of the irregular polygon.
It is possible to draw pay-diagram in Mathcad
that will reflect the elements of the vector, which sum of values equals 100%.
Is it worth to do it? You know that data form Mathcad can be exported to Excel,
for example, where there are tools for construction of pay-diagram,
radar-diagram and other types of graphs. It is possible to insert a fragment of
Excel in Mathcad-document (or Axum – package, which was specially developed for
enlargement of graphical possibilities of Mathcad[2]),
which is meant for reflection of marked graphic. But we have to remember that
when we port the Mathcad-document with such graphics to another computer it
will not work if there are no corresponding applications.