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Topics: programming

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Data Analysis: Understanding Simpson's Paradox

By janert : Today, 12:20 AM
Look at the table below which shows applications and admissions to a fictional college in terms of the applicants' gender and department. MaleFemaleOverallDepartment A80/100 = 0.89/10 = 0.989/110...
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When and How to Use Conditional Plots (Co-Plots) for Data Analysis

By janert : 28 January 2011 - 02:25 PM
In contrast to scatter-plot matrices, which always show all data points but project them onto different surfaces of the parameter space, co-plots (short for “conditional plots”) show various slice...
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Data Analysis: How to Track Aggregated Numbers in a Time Series

By janert : 27 January 2011 - 02:18 PM
On a recent consulting assignment, I was discussing monthly sales numbers with the client when he made the following comment: “Oh, yes, sales for February are always somewhat lower—that’s an aft...
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Data Analysis: How to Forecast With Exponential Smoothing

By janert : 26 January 2011 - 10:38 AM
All moving-average schemes have a number of problems. They are painful to evaluate. For each point, the calculation has to be performed from scratch. It is not possible to evaluate weighted moving av...
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How to Approach Data Analysis

By janert : 24 January 2011 - 09:38 AM
More data analysis efforts seem to go bad because of an excess of sophistication rather than a lack of it. This may come as a surprise, but it has been my experience again and again. As a consultant,...
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Strengths and Weaknesses of Novice Software Developers

By andyo : 05 December 2010 - 05:15 PM
Our observations revealed that novice software developers demonstrate a wide variety of abilities as well as deficiencies. Among their strengths are: Programming Reading and writing specifications De...
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- programming
- software development
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What is the most convenient office space layout for collocated software teams?

By andyo : 02 December 2010 - 11:11 AM
This excerpt deals with an apparently simple question: what is the most convenient office space layout for collocated software teams? Intuitively, we know that space and the distance and accessibility...
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Best Practices for Developer Code Review

By andyo : 29 November 2010 - 08:22 AM
There are a million ways to do a code review, but there’s one component that’s common to all—a single developer critically examining code. So it makes sense to ask what the data tells us about d...
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- programming
- software development
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Do We Need More Software Complexity Metrics?

By andyo : 26 November 2010 - 05:19 PM
Complexity is everywhere in the software life cycle: requirements, analysis, design, and of course, implementation. Complexity is usually an undesired property of software because complexity makes sof...
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How to Apply the Scientific Method to Software Engineering

By andyo : 24 November 2010 - 08:06 AM
I will begin with a distillation of our journey, a process for applying the scientific method to software engineering in an industrial environment. We called our version of the scientific method the Q...
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