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Statistical View of Data in a Clustered Bar Chart


In this article, Naeem shows us how to go about creating a statistical view of data, in the form of a clustered bar chart, using PHP and MySQL.  He provides a real-life scenario, along with accompanying code, to demonstrate how the job can be accomplished.

Author Info:
By: Muhammad Naeem
Rating: 4 stars4 stars4 stars4 stars4 stars / 57
December 01, 2003
TABLE OF CONTENTS:
  1. · Statistical View of Data in a Clustered Bar Chart
  2. · Database
  3. · Getting Down and Dirty
  4. · Drawing Charts
  5. · Conclusion

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Statistical View of Data in a Clustered Bar Chart
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Statistical view of data in the shape of a clustered bar chart is somewhat similar to having to select between two attributes of a single entity. However, a real-life case scenario is far more complicated. As in most cases, the situation has a lot of entities strongly related with each other through E-R diagrams obeying the normalization rules. Moreover, in such cases, data is not only two-dimensional but, rather, it may be multi-dimensional.

Let's look at the following E-R diagram from which we have to present a statistical view (in the form of a clustered bar chart). How can we do this? This article is an attempt to explain the solution.

Prerequisites

You should have Apache web server with PHP and MySQL running.  A fair amount of knowledge in PHP is also required. I have provided a zip archive of a demo along with this article.


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