| Package | Description | 
|---|---|
| de.lmu.ifi.dbs.elki.distance.similarityfunction | Similarity functions. | 
| de.lmu.ifi.dbs.elki.distance.similarityfunction.kernel | Kernel functions. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AbstractDBIDSimilarityFunction<D extends Distance<D>>Abstract super class for distance functions needing a preprocessor. | 
| class  | InvertedDistanceSimilarityFunction<O>Adapter to use a primitive number-distance as similarity measure, by computing
 1/distance. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | LinearKernelFunction<O extends NumberVector<?>>Provides a linear Kernel function that computes a similarity between the two
 feature vectors V1 and V2 defined by V1^T*V2. |