Find local extrema places and values

Returns structure with local extrema (minimum, maximum) places and values.

Returns structure with local extrema (minimum, maximum) places and values.

Elements of output structure:
minx: min places
miny: min values
maxx: max places
maxy: max values

Example:

v=[1 3 5 5 2 -2 -2 -1 8 -10 5];
o1=extrems(v)
o2=extrems(v,'ysort')
o3=extrems(v,'strict')

Outputs:
o1 =
minx: [6 10]
miny: [-2 -10]
maxx: [3 9]
maxy: [5 8]
o2 =
minx: [10 6]
miny: [-10 -2]
maxx: [9 3]
maxy: [8 5]
o3 =
minx: 10
miny: -10
maxx: 9
maxy: 8