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How to build a Tag Cloud Graph?


Dear experts,

Let say, I have a simple list of sales numbers in different products.
The first element of the sublist is a product, the second is a product
group and the 3rd is the turnover. Like this one:

sales={{Beef,Meat, 2343},{Milk,Drink, 234}, {Water,Drink, 234}, {Beer,
Drink, 1546}, {Coke, Drink, 1223}, {Pork, Meat, 1223}}

QUESTION:
How to construct a Tag Cloud Plot in the way as it defined in
wikipedia:

"...Tags are usually single words and are typically listed
alphabetically, and the importance of a tag is shown with font size or
color..."

For full details see:
http://en.wikipedia.org/wiki/Tag_cloud

It should be a frame with words in alphabetical order with different
font color for different product group.

Condition:
For displaying products with huge and very small numbers a maximum and
minimum font size should apply.

Many thanks!

Plotty


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