taco: visualizing changes in tables over...
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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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AQT
xlCompare
daff 4
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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-data7
Change Types
Add & Remove Content Reorder Merge/Split
Result
Table B
Table A
(c) Reorder (d) Content
(b) Merge & Split(a) Add & Remove
Result
Table B
Table A
- - ---
f
f
+- - + -+ Merge Split
b + c
b + c
StructuralChanges
Result
Table B
Table A
(c) Reorder (d) Content
(b) Merge & Split(a) Add & Remove
Result
Table B
Table A
- - ---
f
f
+- - + -+ Merge Split
b + c
b + c
ContentChanges
Result
Table B
Table A
(c) Reorder (d) Content
(b) Merge & Split(a) Add & Remove
Result
Table B
Table A
- - ---
f
f
+- - + -+ Merge Split
b + c
b + c
ReorderChanges
Result
Table B
Table A
(c) Reorder (d) Content
(b) Merge & Split(a) Add & Remove
Result
Table B
Table A
- - ---
f
f
+- - + -+ Merge Split
b + c
b + c
Merge/SplitChanges
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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 Gamesrows = 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
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1936 1948
Level 3: Detailed Pairwise Comparison
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Level 3: Detailed Pairwise Comparison
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1936 1948
Usage Scenario Cancer Genomics571 patients (rows) x 24,174 genes (columns)
21Photo from:
psdesign1 – Fotolia.com
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Server Client
Implementation
github.com/Caleydo/taco taco.caleydoapp.org23
A C1 33 G4
B C1 25 G8
C C2 9 G8
D C2 4 G4
Homogenous Heterogenous
▪ Special Normalization▪ Different Visual Encoding
Limitations
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▪ Cluster matrix in advance
▪ Aspect ratio
▪ Sub-pixel representation
Limitations
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taco.caleydo.orgFunded byHolger [email protected]
TACO: Visualizing Changes in Tables over Time
Christina [email protected]