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Issue 13.4 ('"El Capitan"')
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FEATURE

Charting Personal Health

Adding a scatter chart feature to a PHR solution

Issue: 13.4 (July/August 2015)
Author: J.C. Cruz
Author Bio: JC is a freelance writer based in British Columbia. He is a regular contributor to MacTech Magazine and Dr Dobb's Journal. Away from the writing pile, JC spends quality time with his nephew, as a proper uncle should.
Article Description: No description available.
Article Length (in bytes): 44,214
Starting Page Number: 36
Article Number: 13406
Resource File(s):

Download Icon 13406.zip Updated: 2015-07-01 11:12:03

Related Web Link(s):

http://en.wikipedia.org/wiki/Scatter_plot
http://docs.xojo.com/index.php/Canvas
http://docs.xojo.com/index.php/Graphics

Excerpt of article text...

User-patients may want their health entries shown in a more graphical form. So today, we will learn one way to achieve this—through charts.

We begin with a look at the scatter chart, learn about its makeup, its benefits and limitations. We will design a chart widget, using the Canvas class as its basis. Then we will use the widget to produce two types of scatter charts.

Readers are expected to have a working knowledge of Xojo and REALbasic. The updated PHR project, FooHealthMk2, is available from the magazine's website.

Charting Health Entries

A chart can reveal things that are not immediately obvious from the raw data entries. A chart can show how well a patient's health is progressing. It can show how close they are to a specific health risk. It can also show which entries are suspect and ought to be ignored.

The scatter chart

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