1. A method, implemented on an electronic device, for generating physical sensor data classifiers, the method comprising: receiving a plurality of physical sensor data; identifying a projection vector based on the physical sensor data using a search algorithm, the search algorithm comprising a metric function, wherein identifying a projection vector comprises calculating one or more eigenvalues associated with the metric function using a sparse matrix transform; and producing physical sensor data classifiers by projecting at least a portion of the physical sensor data upon the projection vector.