.. py:function:: find(fs, value, [area_or_mask])
.. py:function:: find(fs, range, [area_or_mask]) :noindex: Returns a list of locations (lat/lon pairs) where the values of ``fs`` equal to or within the range of ``value_or_range``. :param fs: input fieldset :type fs: :class:`Fieldset` :param number value: the value defining the search condition :param list range: the range defining the search condition :param area_or_mask: area or mask field restricting the search :type area_or_mask: list or :class:`Fieldset` :rtype: list of lists The primary search condition is defined by ``value`` or ``range``: * if ``value`` is specified the locations where ``fs`` equals to this number are returned * if ``range`` is specified as a list of [v1, v2] the locations where ``fs`` values are within the closed range of [v1, v2] are returned The optional ``area_or_mask`` argument can pose an additional search condition: * if ``area_or_mask`` is a list of four numbers it defines the area as [North,West,South,East] for the search * if ``area_or_mask`` is a :class:`Fieldset` with one field it defines a mask for the search, e.i. only those gridpoints are checked where the mask value is non-zero. Missing values in ``fs`` are not returned.
.. mv-minigallery:: find