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local_maxloc(array, position [, /subgrid, /bound])
Finds position and value of local maxima in array, starting
at the positions (indices) in position and walking along
the steepest gradient. position must be a scalar or array
of indices to array. By default, a local maximum on the
grid is returned. Keyword /subgrid requests return of the
subgrid position, as determined from a quadratic fit near the integer
position, with the subgrid position forced to be within one px in any
coordinate from the integer position. Allow far subgrid results by also
specifying /nobound. The last found maximum is put in
!lastmax and !lastmaxloc (the latter always integer), and
all found positions are returned as coordinates to array.
If an indicated position falls before the beginning or
after the end of the array then the nearest position inside
the array is used instead.
See also: local_max, local_min, local_minloc, max, maxloc, !lastmax, !lastmaxloc