Dependent parameters whose requirements are not satisfied are represented by a scalar NA
in the elements of x of the return value.
getOptPathEl(op, index)[OptPath]
Optimization path.
[integer(1)]
Index of element.
List with elements x [named list], y [named numeric],
dob [integer(1)], eol [integer(1)].
The elements error.message [character(1)],
exec.time [numeric(1)] and extra [named list] are
there if the respective options in OptPath are enabled.
Other optpath: OptPath,
addOptPathEl,
getOptPathBestIndex,
getOptPathCols,
getOptPathCol, getOptPathDOB,
getOptPathEOL,
getOptPathErrorMessages,
getOptPathExecTimes,
getOptPathLength,
getOptPathParetoFront,
getOptPathX, getOptPathY,
setOptPathElDOB,
setOptPathElEOL