computer science

Trendalyzer

Trendalyzer is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Trendalyzer rather than just read about it. In short: Trendalyzer is an information visualization software program for animation of statistics that was initially developed by Hans Rosling's Gapminder Foundation in Sweden. In March 2007, it was acquired by Google Inc.

Key takeaways

Trendalyzer belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Trendalyzer to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Trendalyzer from memory before moving on to harder problems.

Reference excerpt

Trendalyzer is an information visualization software program for animation of statistics that was initially developed by Hans Rosling's Gapminder Foundation in Sweden. In March 2007, it was acquired by Google Inc. The current beta version is a Flash application that is preloaded with statistical and historical data about the development of the countries of the world. The information visualization technique used by Trendalyzer is an interactive bubble chart. By default it shows five variables: Two numeric variables on the X and Y axes, bubble size and colour, and a time variable that may be manipulated with a slider. The software uses brushing and linking techniques for displaying the numeric value of a highlighted country. Components of the Trendalyzer software, particularly the Flash-based Motion Chart gadget, have become available for public use as part of the Google Visualizations API (see [1] ).

Similar projects Trend Compass (flash) Eurostat explorer (flash)

References

External links The Gapminder World, using Trendalyzer to display various statistics about the world's countries. A tab allows access to a download package Make Your Data Tell a Story: "Reports, tables, charts and dashboards all deliver information, but information alone isn't understanding" FAQ: How do I use Gapminder graphics in my presentation?: Implement Gapminder graphs in your presentation using Gapminder Tools Offline. Webpage with Installation package for 2007 version Example for visualization of environmental data (environmental accounting)

Illustrations

Worked examples

Example 1 — a first encounter with Trendalyzer

Start with the simplest possible case. Write down what Trendalyzer claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Trendalyzer before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Trendalyzer ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Trendalyzer

In research: Trendalyzer appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Trendalyzer in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Trendalyzer is common in secondary-school and first-year university syllabi. It links to neighbouring topics Data and information visualization software, Google acquisitions, Google stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Trendalyzer outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Trendalyzer in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Trendalyzer means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Trendalyzer out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Trendalyzer in simple terms?

Why does Trendalyzer matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Trendalyzer?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Trendalyzer.