Graphics Reference
In-Depth Information
In this example, the co-occurrence of hash tags in the first tweet can be
used to identify a link (for example, #Wendys and #McDonalds ). In the
second tweet, co-occurrence of stock symbols for Target, Coca-Cola, and
McDonald's can be used to establish links ( $TGT , $KO , $MCD ), and in the
third tweet, a link between users can be identified ( @wallstCS and
@Jacqui_WSCS ).
In a less-structured set of data (such as a book), nodes can be identified
such as characters in a story. Consider Alice's Adventures in Wonderland
(NewYork:HarperCollins,1865).Characters(suchasAlice,theMadHatter,
and the Rabbit) are nodes. Links can be created such as co-occurrence of
characters within a paragraph, as shown here:
There was nothing so VERY remarkable in that; nor did
Alice think it so
VERY much out of the way to hear the Rabbit say to
itself, 'Oh dear! Oh
dear! I shall be late!' (when she thought it over
afterwards, it
occurred to her that she ought to have wondered at
this, but at the
time it all s eemed quite natural); but when the
Rabbit actually TOOK
A WATCH OUT OF ITS WAISTCOAT-POCKET, and looked at it,
and then hurried
on, Alice started to her feet, for it flashed across
her mind that she
had never before seen a rabbit with either a
waistcoat-pocket, or
a watch to take out of it, and burning with curiosity,
she ran
across the field after it, and fortunately was just in
time to
see it pop down a large rabbit-hole under the hedge.
...
Matrix (for Example, Trade, Migration)
Sometimes a matrix of data contains the same entries in both the first
column and first row.
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