Data analysis
Articles
Crosstabs as charts: introducing the contingency map
Tabular presentation is one of the most universal reporting techniques.
The Marimekko chart or analytical patchwork
What data can we show on a regular bar chart? How many variables can we use? For those who answered…
Cross-selling and tables
What combination of products frequently end up in a shopper's basket? What services are usually bou…
Multiple choice: which percentage base to use?
Multiple choice questions where the respondent may select more than one answer are commonly used in…
Weights and tables
When creating a table, you can present weighted or unweighted data. As usual, the answer depends on…
Trees that grow from tables
When stepping outside the domain of distributive and descriptive statistics for individual variable…
Is gambling addictive? What if the respondent has no opinion?
The standard approach to investigating a single categorical variable involves a few elements.
Story of a pie
You may not know this but this year is the 217th birthday of the humble pie chart. Its first known,…
Reduction of multidimensionality
Is a simple two-dimensional coordinate system always enough for us?
How to prepare for reliability analysis?
The area of reliability analysis is of interest first of all to those who plan to use scales and in…
What do waterfalls have to do with data visualization?
A waterfall graph, otherwise known as a cascade chart, may mean very little to those of us from out…
Speedometers in reporting
Speedometers, or gauges, are very intuitive hence their popularity in dashboarding. But they evoke …
Perceptual maps: choosing the correct normalization method
In this article you can find perceptual maps prepared using different normalization methods.
Correspondence analysis: solution quality assessment
Correspondence analysis is a technique often thought of as an alternative to a crosstab (contingenc…
Violin plot
Before starting a more complex data analysis, it is worth taking a closer look at variable distribu…
Table or cube? Reporting in the form of olap cubes
When we want to include a lot of values in a table, in several various cross-sections e.g. by time,…
Series plot
The series plot is a type o linear or layered plot most often used to represent changes in time. Th…
Maps that grow out of trees: data visualisation as an artform
In the previous PS blog “Trees that grow out of tables”, Janusz Wachnicki described how a good unde…
Visualising decision trees: the classic refurbished
In this post, we continue to discuss the visualisation of nested hierarchical data. In my previous …
Pointing the way with arrows
When creating dashboards, reports, or infographics, you often use other elements besides charts and…
Correspondence analysis: calculating distances in a table
Correspondence analysis is one of the most convenient and popular exploratory techniques in data an…
Hierarchical graph
Hierarchical data can be presented using various visualisations. Today’s article will focus on the …
Word cloud: an extraordinary visualisation from an ordinary table
Frequency, group structure, or percentage share analysis is one of the first tasks of an analyst.
Sankey diagram
When analysing data on migration, transport, international trade, or traffic on a website, you are …
Tables for multiple questions measured using the same scale
Surveys often use questions where respondents assess different elements on the same scale.
When is a value ‘good’ or ‘bad’? About thresholds and alerts in dashboards
The dashboard is a form of reporting, which allows the analyst to convey information in a concise w…
SNA or network as an analytical object
Today, we will look into Social Network Analysis (SNA), or Social Relation Analysis.
Shopping for a mountain trip: analysis of multiple response sets
Multiple response sets often form the basis for further detailed questions about opinions on select…
Consumer shopping value analysis using regression trees. Part 1
How can we estimate the potential value of consumer shopping, predict the behavior of a visitor to …