Parameters for IMS matching

Parameters that define how mobility or CCS values between e.g. features and suspects should be matched.

getIMSMatchParams(param, ...)

Arguments

param

Should be "mobility" or "CCS" to match by mobility or CCS, respectively.

...

optional named arguments that override defaults.

Details

The following parameters should be defined:

• param Should be "mobility" or "CCS" to match by mobility or CCS, respectively.

• window,relative The window parameter sets the tolerance window size used for matching. If relative=TRUE then the tolerance is relative (0-1). The defaults for window are (see limits):

  • defaultLim("mobility", "medium") (param="mobility" and relative=FALSE)

  • defaultLim("mobility", "medium_rel") (param="mobility" and relative=TRUE)

  • defaultLim("CCS", "medium") (param="CCS" and relative=FALSE)

  • defaultLim("CCS", "medium_rel") (param="CCS" and relative=TRUE)

• minMatches The minimum number of mobility/CCS matches for a suspect hit. If the number of available reference mobility/CCS values in the suspect list is less than minMatches, then that number is used as threshold. Set to 0 to disable.

These parameters are passed as a named list as the IMSMatchParams argument to functions.

The getIMSMatchParams function generates such parameter list with defaults.

Note

If negation is enabled with suspect filtering and minMatches>0, then the window match filter is not negated. Negating both would lead to unexpected results, i.e. suspects outside window are kept and increase the number of matched suspects as seen by the minMatches filter.