TACO: Visualizing Changes in Tables over Time - Caleydo

TACO: Visualizing Changes in Tables over Time Christina Niederer, Holger Stitz, Reem Hourieh, Florian Grassinger, Wolfgang Aigner, and Marc Streit

@ChriNiederer, @holgerstitz, @Reem7, @wolfgangaigner, @marc_streit

Have you ever compared tables?

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Insertions? Deletions? Value changes? Order changes?

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xlCompare

AQT

daff

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User Tasks

T1: Identify the types of changes

T2: Compare multiple table versions over time

T3: Compare one table at two particular time points

T4: Present raw data tables and meta-data 7

Table A

Table A

b+c -

+

-

+

+

-

Merge

Split

-

Change Types Table B

f

Result

f

Add & Remove (a) Add & Remove

b+c

Table TableAA +

-

+

+

-

Table TableBB

f

Result Result

f

Table A

(c) Reorder Structural Changes

Merge -

Split -

-

b+c

+

-

Result

f

Reorder (a) Add & Remove (c) Reorder -

Merge

-

-

-

b+c (d) Content

b+c +

-

+

+

-

f

Result Result

f

-

Split

Merge/Split (b) Merge & Split

Table BB Table

Content ChangesTable A -

+

f

(d) Content

Table B

-

-

Table AA Table

b+c -

+

Table B

Content (b) & Split (d)Merge Content

(c) Reorder

b+c

Reorder Changes

(c) Reorder

Merge -

-

Split -

-

-

b+c

Merge/Split Changes

(d) Content

-

-

-

-

-

Table B 8

Result

Visualization Design

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LEVEL 1: Change Overview Timeline

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LEVEL 2: Aggregated Pairwise Comparison

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LEVEL 3: Detailed Pairwise Comparison

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Usage Scenario Summer Olympic Games rows = countries, columns = disciplines

Photo from: AthleticsMotivation.com

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Level 1: Change Overview Timeline

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Level 1: Change Overview Timeline

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Level 2: Aggregated Pairwise Comparison

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Level 2: Aggregated Pairwise Comparison

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Level 3: Detailed Pairwise Comparison

1936

1948 18

Level 3: Detailed Pairwise Comparison

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Level 3: Detailed Pairwise Comparison

1936

1948 20

Usage Scenario Cancer Genomics 571 patients (rows) x 24,174 genes (columns)

Photo from: psdesign1 – Fotolia.com

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Implementation Server

github.com/Caleydo/taco

Client

taco.caleydoapp.org

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Limitations Heterogenous

Homogenous A

C1

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G4

B

C1

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G8

C

C2

9

G8

D

C2

4

G4

▪ Special Normalization ▪ Different Visual Encoding 24

Limitations ▪ Cluster matrix in advance ▪ Aspect ratio ▪ Sub-pixel representation

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TACO: Visualizing Changes in Tables over Time

Christina Niederer [email protected] Holger Stitz [email protected]

Funded by

taco.caleydo.org