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comik/**getInstanceWeights.m**

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function [thetaVals, instanceWeightsInEachBag] = getInstanceWeights(kernelWeights, allSeqsTransformationKernel) | |

% GETINSTANCEWEIGHTS | |

% Computes the theta values and instance weights from the sub-kernel weights and segment | |

% transformations | |

% | |

% INPUT PARAMS | |

% Param 'kernelWeights' | |

% Weights assigned by MKL tf each of the sub-kernels in the collection | |

% | |

% Param 'allSeqsTransformationKernel' | |

% Per sequence transformation of segments used to compute the instance weights | |

% | |

% OUTPUT PARAMS | |

% Param 'thetaVals' | |

% The theta values corresponding to each cluster centre | |

% | |

% Param 'instanceWeightsInEachBag' | |

% Weight for each segment per sequence | |

% | |

% ADDITIONAL NOTES | |

% -- Theta vals and sub-kernel weights follow a squared relation (Refer paper) | |

% | |

% -- Order followed is: | |

% . non-shifted kernels (1 to N) first, then shifted kernels (N+1 to 2N) in total 2N kernels | |

% | |

% -- Number of kernels is same as number of clusters | |

% | |

% | |

% Author: snikumbh@mpi-inf.mpg.de | |

thetaVals = sqrt(kernelWeights); | |

thetaVals = thetaVals'; | |

nBags = size(allSeqsTransformationKernel,2); | |

nKernels = size(kernelWeights,1); | |

for j=1:nBags | |

instanceWeightsInEachBag{j} = zeros(size(allSeqsTransformationKernel{j},1) , 1); | |

end | |

% compute instance weights for instances in each bag | |

% | |

for j=1:nBags | |

temp = sum(repmat(thetaVals(1, 1 : nKernels ), ... | |

size(allSeqsTransformationKernel{j},1), 1) ... | |

.* allSeqsTransformationKernel{j}, 2); | |

instanceWeightsInEachBag{j} = temp; | |

% if to be written to file, pass fname to the function | |

% stdTemp = standardizeMatrix(temp'); | |

% finalTemp = zeros(size(stdTemp)); | |

% Using rankings | |

% [~, ranking] = sort(stdTemp(1:size(stdTemp,1),1:size(stdTemp,2)), 2, 'descend'); | |

% finalTemp(1,ranking) = 1:size(stdTemp,2); | |

% dlmwrite(fname, finalTemp, '-append'); | |

end | |

end |