Example 1 of How to Express Quantity With Different Channels

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Из курса от партнера New York University Tandon School of Engineering

Information Visualization: Applied Perception

23 оценки

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New York University Tandon School of Engineering

Information Visualization: Applied Perception

23 оценки

Курс 2 из 4 — Specialization Information Visualization

This module aims at introducing fundamental concepts of visual perception applied to information visualization. These concepts help the student ideate and evaluate visualization designs in terms of how well they leverage the capabilities of the human perceptual machinery.

Из урока

Applied Perception for Information Visualization

What is “Applied Perception”? Why Study It?9:10

Human Visual Processing System9:05

Saccadic Eye Movement5:45

Role of Attention In Visual Perception8:40

Visual Queries10:17

What We Can Easily See7:59

Recapitulation of Key Concepts7:47

Mapping Between Data Properties6:37

Expressiveness of Visual Channel8:04

Example 1 of How to Express Quantity With Different Channels3:32

Example 2 of How to Express the Idea of Order With Different Channels5:07

Example 3 of How to Express Categories With Different Channels4:13

Познакомьтесь с преподавателями

Enrico Bertini
Associate Professor
Computer Science and Engineering
Cristian Felix
PhD. Candidate
Computer Science and Engineering

Okay. Now, let me give you a few examples

of how to express quantity with different channels.

We will start with the first one, which is position.

So, imagine that we have one axis, like this,

and the position of an object on this axis can express a quantity.

A very similar situation you might be more familiar with is when I have a pair of axis,

like this one orthogonal axis,

and the position of one dot would actually represent the two quantities at the same time.

This is exactly the technique that is used when one creates a scatter plot.

Okay. One can express quantity also using size.

So, for instance, the size of bubbles,

like in this case,

the area can be used as a channel to convey information about a quantity.

The same can be done,

for instance, with the length of bars.

This is what you find in bar charts.

The length of a bar expresses information about a quantity.

Another channel that we can use is angle.

So, one way to show that is, for instance,

the angle of pizza slices, like this one.

So, this one has a bigger angle than this one.

So, B is bigger than A, for instance.

But that's not all, we can also use a slope for direction.

So, if I draw two lines,

one like this and one like this,

so these two lines can express

the direction and slope of these lines can express quantity,

and you can very readily see that this one here is steeper than this one here.

Last one that I want to show you is color intensity.

So, if I have patches of color, like this ones.

So, this is clearer,

this is darker, and this is even darker,

so the intensity of colors can also be used as a way to express a quantity.

So, in summary, we have position,

size, note that size can be expressed in many different ways.

So, here, for instance,

we used area size but also length of bars,

then we have angle.

So, for instance, in pie charts,

angle is used together with other channels to express,

together with area to express a quantity,

then we have slope.

For instance, this is used in line charts to

express information about how quickly something changes over time.

Finally, we have color intensity.

Color intensity.

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