santiago gonzález tortosa data mining vs visualization
TRANSCRIPT
I. Data Mining VS VisualizationII. Visualize to DMIII.DM to Visualize (to DM)IV.Real world work:
I. Global Behavior Modeling: A New approach to Grid autonomic management
Contents
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• Data Mining – Knowledge discovery and extration– Not always is easy to see patterns,
distributions, etc.
• Visualization– Represents data (2D, 3D, Virtual Reality,…)– Helps to extract patterns– Not always is easy to represent data in 2
or 3 dimensions
Data Mining VS Visualization
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• Visualization help us to extract any pattern in the data
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Visualize to DM
• Visualization help us to extract any pattern in the data
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Visualize to DM
• Data contains N (> 3) features– Curse of Dimensionality
• We want to visualize all data• Dimensionality Reduction
– Reduce number of features– Transform and create new features
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DM to Visualize
• Dimensionality Reduction– L.J.P. van der Maaten, E.O. Postma, and H.J. van
den Herik. Dimensionality Reduction: A Comparative Review. Tilburg University Technical Report, TiCC-TR 2009-005, 2009
• Convex techniques: optimize an objective function that does not contain any local optima
• Nonconvex techniques: optimize objective functions that do contain local optima
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DM to Visualize
• Optimization techniques (hill climbing, evolutive, etc.)
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DM to Visualize
• Optimization techniques– One objective– One objective with constraints (Semi-
Supervised and labeling)– Multiobjective
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DM to Visualize
• Example: Optimize axis
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DM to Visualize
• Dimensionality Reduction in 2 phases:– FSS: Feature Subset Selection (wrapper,
needed CLASS!)– Transformation and creation of new features
(f.e. PCA)
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DM to Visualize
• Example of Dimensionality Reduction in 2 phases– User expert interacts
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DM to Visualize
• DM to Visualize….to DM!!• The idea is to obtain new knowledge or
patterns viewing the data.– Supervised info: data with the same class are
represented in the same area (KNN).– Unsupervised info: data is agrouped
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DM to Visualize
• Example that some data is agrouped
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DM to Visualize
• Visualization– 2D and 3D visualization– Virtual Reality
• Inmersion• Interaction• Imagination
– Augmented Reality
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DM to Visualize
Global Behavior Modeling: A New approach to Grid
autonomic management
Jesus Montes <[email protected]>
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Real world work
