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Questions and Answers
What is the primary goal of clustering in machine learning?
What is the primary goal of clustering in machine learning?
What is a characteristic of unsupervised machine learning in clustering?
What is a characteristic of unsupervised machine learning in clustering?
What is the purpose of evaluating a clustering model?
What is the purpose of evaluating a clustering model?
What is an example of a clustering algorithm?
What is an example of a clustering algorithm?
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What is the role of features in clustering?
What is the role of features in clustering?
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What is the result of a clustering model?
What is the result of a clustering model?
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Study Notes
Clustering in Machine Learning
- Clustering is an unsupervised machine learning method that groups observations into clusters based on similarities in their data values or features.
Key Characteristics of Clustering
- Does not use previously known label values to train a model
- The label is the cluster to which the observation is assigned, based only on its features
Example of Clustering
- A botanist records the number of leaves and petals on each flower in a sample, with no known labels in the dataset
- Goal is to group similar flowers together based on the number of leaves and petals, not to identify different species of flowers
Training a Clustering Model
- Multiple algorithms can be used for clustering
- K-Means clustering is a commonly used algorithm, consisting of multiple steps (animation illustrates the process)
Evaluating a Clustering Model
- Evaluation is based on how well the resulting clusters are separated from one another
- Multiple metrics can be used to evaluate cluster separation, including various metrics
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Description
Clustering is an unsupervised machine learning method that groups observations into clusters based on similarities in their data values. This technique is used to identify patterns and structures in data without prior knowledge of labels.
