matthias mayer the table lens - ramana rao & stuart k. card information visualization 838b -...

Matthias Mayer The Table Lens - Ramana Rao & Stuart K. Card

Information Visualization 838b - February 21st [email protected]

The Table Lens:

Merging Graphical and Symbolic Representations in an Interactive Focus+Context Visualization for Tabular Information

Ramana RaoStuart K. Card (Xerox PARC)

ACM CHI 1994

Overview

Paper DescriptionContributions References CritiqueWhat has happened to Table Lenses?

Mini Demo

Paper Description

Introduction

Focus+ContextTechnique

Graphical Map-ping Scheme

User Interface

Data AnalysisScenarios

Paper DescriptionWhat are Table Lenses good for?

to make Sense of large Tablesto effectively analyze large Spreadsheetsto solve more Problems on small Screens

they use a Focus&Context/ Fisheye Technique

Introduction

User Interface

Paper DescriptionDesign of Table Lenses

In the Design they consideredProperties of Tables:

Regularity of Content-> preserve coherence of rows & columns

despite distortions.

Rows and Columns are independent-> independent distortion in both directions.-> multiple focal areas possible.

Introduction

User Interface

Paper DescriptionDesign of Table Lenses

Introduction

User Interface

Paper DescriptionDistortion Framework

DOI Function (Degree of Interest - by Furnas)

maps from item to valuecontrols space allocation of cells

Introduction

User Interface

Introduction

User Interface

Introduction

User Interface

Introduction

User Interface

DOI Function (Degree of Interest - by Furnas)maps from item to valuecontrols space allocation of cells

Transfer Function: Integral of DOI

Introduction

User Interface

Compared to sooner approaches:

Perspective Wall

Document Lens

DOI flat topped mountain with sloped regions

Introduction

User Interface

Paper DescriptionInteractive Manipulation

Introduction

User Interface

3 basic Manipulations:Introduction

User Interface

Paper Description

Different graphical representations of Content

Graphical Vocabulary:Text, Color, Shading, Length, Position

Determined by 6 Factors:

Value Value Type (quantitative vs. categorial)Region Type (focal...) Cell Size User's Choice (e.g. left = 0)Spotlights

Introduction

User Interface

Paper Description

Manipulation of Focus:pointer gestures & control pointsgrasping & dragging

different operators on columns: sorting, rearranging, calculating new columns

Introduction

User Interface

Paper Description

See Demo later.Introduction

User Interface

My favourite Sentence

"The combination of our focus+context technique and graphical mapping scheme, with a small set of interactive operatorsenables performing exploratory data analysisin a highly interactive and natural manner."

Contributions

They applied Focus&Context Technique to tables of data.

The technique allows to integrate detailed symbolic data with less detailed graphicalrepresentations.

Precise description of - specific Focus+Context technique- specific interaction techniques- graphical mapping scheme

1993 Stretching rubber sheet:(Sarkar, Snibbe, Reiss)Document Lens +3D Interactive Animation(Robertson, MacKinlay)

Notes on References

1982 Bifocal Display (Spence & Apperley)1986 Fisheye Views (Furnas)

1991 Perspective Wall (MacKinlay, Robertson, Card)

1992 Fisheye Views for Graphs (Sarkar & Brown)

Notes on References

Critique: Strengths

Provide a new technique which seems to behighly usable.

Large field of possible application.(Spreadsheets, tabular data).

Good structure of paper: F+C / Interaction / Graphical Mapping

Critique: Weaknesses

They didn't show limitations of their approachnumbers of items possible kinds of analysis

Ways of analysis were not formally described.

No study was made.

Baseball examples are not globally understandable.

No Labels on axes.

What has happened to this topic?

TableLens was sold by InXight, a Xerox Spinoff Company.

Now Eureka 1.1.txt+csv+xls - importdatabase queriesgroupingfilteringweb-export

30 days trial: www.inxight.com

matthias mayer the table lens - ramana rao & stuart k. card information visualization 838b -...

Documents

table lens ramana rao

card information visualization

matthias mayer

table lenses good

mini demo slide

card xerox parc acm

furnas maps

coherence of rows columns