Comparing event data sets
View Patent ↗An apparatus for comparing event data sets. A system and computer program for comparing event data sets comprising: calculating one or more derivatives for each event in a first and second set of events; classifying each event by the calculated derivatives; and evaluating a similarity of the first and second sets of events based on the classifications of the respective events.
1. A system for comparing event data sets comprising:
a calculating engine for calculating one or more derivatives for each event in a first and second set of events;
a classifying engine for classifying each event by respective calculated derivatives; and
a correlating engine for correlating first and second sets of events based on the classifications of the respective events,
wherein each derivative is classified as a negative, zero or positive value and each event is classified according to a combination of negative, zero and positive values of the derivatives.
2. A system as claimed in claim 1 , wherein a first derivative is approximated as a distance between two consecutive events divided by a difference of their time stamps.
3. A system as claimed in claim 2 , wherein a second derivative is approximated as a distance between two consecutive first derivatives divided by the difference of the time stamps.
4. A system as claimed in claim 3 , wherein a third derivative is approximated as a distance between two consecutive second derivatives divided by the difference of the time stamps.
5. A system as claimed in claim 2 , wherein the difference in timestamps is a unit value.
6. A system as claimed in claim 2 , further comprising a first derivative noise level as a fraction of a maximum derivative value whereby if the first derivative is between the absolute first derivative noise level then the first derivative is taken as neutral.
7. A system as claimed in claim 2 , further comprising a smoothing engine for smoothing the metrics to reduce noise.
8. A computer program product for comparing event data sets comprising, the computer program product comprising a non-transitory computer readable storage device readable by a processing circuit and storing instructions for execution by the processing circuit for performing steps of:
calculating one or more derivatives for each event in a first and second set of events;
classifying each event by respective calculated derivatives; and
correlating first and second sets of events based on the classifications of the respective events,
wherein each derivative is classified as a negative, zero or positive value and each event is classified according to a combination of negative, zero and positive values of the derivatives.
9. A computer program product as claimed in claim 8 , wherein a first derivative is approximated as a distance between two consecutive events.
10. A computer program product as claimed in claim 8 , wherein a first derivative is approximated as a distance between two consecutive events divided by a difference of their time stamps.
11. A computer program stored on a non-transitory computer readable device and loadable into the internal memory of a digital computer, comprising software code portions, when said program is run on a computer, for performing the steps of:
calculating one or more derivatives for each event in a first and second set of events;
classifying each event by respective calculated derivatives; and
correlating first and second sets of events based on the classifications of the respective events,
wherein each derivative is classified as a negative, zero or positive value and each event is classified according to a combination of negative, zero and positive values of the derivatives.
12. A computer program as claimed in claim 11 , wherein a first derivative is approximated as a distance between two consecutive events.
13. A computer program as claimed in claim 11 , wherein a first derivative is approximated as a distance between two consecutive events divided by a difference of their time stamps.