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KernelFunctionCacheTKernel, TInput Class |
Value cache for kernel function evaluations. The total memory size occupied by the
cache can fluctuate between MinimumBytes and MaximumBytes.
Inheritance HierarchySystemObject
Accord.Statistics.KernelsKernelFunctionCacheTKernel, TInput
Accord.Statistics.KernelsKernelFunctionCache
Accord.Statistics.KernelsKernelFunctionCacheTKernel, TInput
Accord.Statistics.KernelsKernelFunctionCache
Namespace: Accord.Statistics.Kernels
Assembly: Accord.Statistics (in Accord.Statistics.dll) Version: 3.8.0
Syntaxpublic class KernelFunctionCache<TKernel, TInput> : IDisposable where TKernel : Object, IKernel<TInput>
Type Parameters
- TKernel
- TInput
The KernelFunctionCacheTKernel, TInput type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | KernelFunctionCacheTKernel, TInput(TKernel, TInput) |
Constructs a new KernelFunctionCache.
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| KernelFunctionCacheTKernel, TInput(TKernel, TInput, Int32) |
Constructs a new KernelFunctionCache.
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Properties| Name | Description | |
|---|---|---|
 | Count |
Gets the current number of rows stored in this cache.
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| Enabled |
Gets a value indicating whether the cache is enabled. If the value
is false, it means the kernel function is being evaluated on-the-fly.
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| Hits |
Gets the total number of cache hits.
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| ItemInt32 |
Attempts to retrieve the value of the kernel function
from the diagonal of the kernel matrix. If the value
is not available, it is immediately computed and inserted
in the cache.
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| ItemInt32, Int32 |
Attempts to retrieve the kernel function evaluated between point at index i
and j. If it is not cached, it will be computed and the cache will be updated.
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| MaximumBytes |
Gets the maximum size of the cache, measured in bytes.
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| MinimumBytes |
Gets the minimum size of the cache, measured in bytes.
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| Misses |
Gets the total number of cache misses.
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| Size |
Gets the size of the cache, measured in number of rows.
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| Usage |
Gets the percentage of the cache currently in use.
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Methods| Name | Description | |
|---|---|---|
| Clear |
Clears the cache.
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| Dispose |
Disposes this instance.
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 | Dispose(Boolean) |
Releases unmanaged and - optionally - managed resources.
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| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
| Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| GetDataCache |
Gets a copy of the data cache.
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| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetKeyFromIndex |
Gets the key from the given indices.
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| GetLeastRecentlyUsedList |
Gets a copy of the Least Recently Used (LRU) List of
Kernel Matrix elements. Elements on the start of the
list have been used most; elements at the end are
about to be discarded from the cache.
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| GetOrCompute(Int32) |
Attempts to retrieve the value of the kernel function
from the diagonal of the kernel matrix. If the value
is not available, it is immediately computed and inserted
in the cache.
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| GetOrCompute(Int32, Int32) |
Attempts to retrieve the kernel function evaluated between point at index i
and j. If it is not cached, it will be computed and the cache will be updated.
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| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| Reset |
Resets cache statistics.
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| ToString | Returns a string that represents the current object. (Inherited from Object.) |
Extension Methods| Name | Description | |
|---|---|---|
 | HasMethod |
Checks whether an object implements a method with the given name.
(Defined by ExtensionMethods.) |
| IsEqual |
Compares two objects for equality, performing an elementwise
comparison if the elements are vectors or matrices.
(Defined by Matrix.) |
| To(Type) | Overloaded.
Converts an object into another type, irrespective of whether
the conversion can be done at compile time or not. This can be
used to convert generic types to numeric types during runtime.
(Defined by ExtensionMethods.) |
| ToT | Overloaded.
Converts an object into another type, irrespective of whether
the conversion can be done at compile time or not. This can be
used to convert generic types to numeric types during runtime.
(Defined by ExtensionMethods.) |
RemarksThis class works as a least-recently-used cache for elements computed from a the kernel (Gram) matrix. Elements which have not been needed for some time are discarded from the cache; while elements which are constantly requested remains cached.
The use of cache may speedup learning by a large factor; however the actual speedup may vary according to the choice of cache size.
The total memory size occupied by the cache can fluctuate between MinimumBytes and MaximumBytes.
See Also