Abstract: Aspects of the invention include monitoring code coverage by executing a code sequence having a plurality of embedded markers. Aspects also include transmitting, upon encountering one of the plurality of embedded markers, a probing signal corresponding to the one of the plurality of embedded markers. Aspects further include obtaining, by a programmable data recorder, a debug level for the execution of the code sequence. Aspects also include storing the probing signal in a trace array based on a determination, by a programmable data recorder based on the debug level, that the probing signal should be recorded.

Abstract: In a computer-implemented method for improving a k-means clustering algorithm, a processor modifies a first data point of a data set to include a first distribution boundary. A processor calculates a first effective distance between the first distribution boundary and a first centroid of a cluster. A processor assigns the first data point to the first cluster. A processor recomputes the first centroid based on the first data point and the first distribution boundary.