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Supplementary Points: Aiding Interpretation of Correspondence Analysis
17 August 2017 | by Jake Hoare

Including supplementary row or column points to a correspondence analysis after the core data has determined the map can improve interpretation of the results. Correspondence analysis is a technique for analyzing tables of data, often used…

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Moonplot to show brand mapping from a correspondence analysis Correspondence Analysis Moonplots: A Better Visualization for Brand Maps
15 August 2017 | by Tim Bock

A Better Way to Visualize Brand Maps Correspondence analysis is the standard tool for creating brand maps. It shows which brands compete with which other brands and the basis for that competition. Unfortunately, correspondence analysis…

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Scaled world map showing longitude and latitude Normalization and the Scaling Problem in Correspondence Analysis
08 August 2017 | by Tim Bock

This post gives recommendations for the best approach to normalization for different situations, making correspondence plots less misleading.

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correspondence analysis example Understanding the Math of Correspondence Analysis with Examples in R
08 August 2017 | by Tim Bock

Correspondence analysis is a popular tool for visualizing the patterns in large tables. To many practitioners it is probably a black box. Table goes in, chart comes out. In this post I explain the mathematics…

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correspondence analysis Using Bubble Charts to Show Significant Relationships and Residuals in Correspondence Analysis
08 July 2017 | by Tim Bock

While correspondence analysis does a great job at highlighting relationships in large tables, a practical problem is that correspondence analysis only shows the strongest relationships, and sometimes some of the weaker relationships may be of more interest. One…

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Trump delivers an address Why Capability Trumps Character for Supporters of the US President
06 July 2017 | by Tim Bock

American supporters of Donald Trump believe that financial skills are more important in a president than decency and ethics, a new survey shows. Data science app Displayr and survey company Research Now questioned 1,015 adult…

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Traditional Crosstab Old-School Crosstabs: Obsolete Since 1990, but Still a Great Way to Waste Time and Reduce Quality
27 June 2017 | by Tim Bock

The table above is what I call an old-school crosstab. If you squint, and have seen one of these before, then you can probably read it. The basic design of these has been around since the 1960s. Originally,…

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statistical significance trick The Magic Trick that Highlights Interesting Results on Any Table
12 June 2017 | by Tim Bock

This post describes the single biggest time saving technique that I know about for highlighting significant results on a table. The table below, which shows the results of a MANOVA, illustrates the trick. The coloring…

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correspondence-analysis-sales When to Use, and Not Use, Correspondence Analysis
23 May 2017 | by Tim Bock

Correspondence analysis is one of those rare data science tools which make things simpler. You start with a big table that is too hard to read, and end with a relatively simple visualization. In this…

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correspondence analysis movements Using Correspondence Analysis to Compare Sub-Groups and Understand Trends
22 May 2017 | by Tim Bock

This post shows how to use correspondence analysis to compare sub-groups. It focuses on one of the most interesting types of sub-groups: data at different points in time. This is variously known as trend, tracking, longitudinal and time series data. The end-goal…

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Multiple Correspondence Analysis Correspondence Analysis Versus Multiple Correspondence Analysis: Which to Use and When?
22 May 2017 | by Tim Bock

Let me cut to the chase. Multiple correspondence analysis sounds better than correspondence analysis. But, for 99% of real-world data problems, correspondence analysis is the more useful technique. In this post I explain the difference…

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How Correspondence Analysis Works (A Simple Explanation)
19 May 2017 | by Tim Bock

Correspondence analysis is a data science tool for summarizing tables. This post explains the basics of how it works. It focuses on how to understand the underlying logic without entering into an explanation of the actual maths.    …

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