pad_pad_stream::get_extrema

Source: stream/pad/Pad/pad_pad_stream__get_extrema.pro

 pad_pad_stream::get_extrema
        Return the extreme values of the processed rates of a pad
        stream. 
        
 Usage:
        range = strref -> get_extrema([keys])

 Keywords:
        zero    If set, then return zeros rather than NaNs when no
                data are present.
        positive If set, then use min_nz instead of min to give a
                positive-definite range
        index   long    If this is specified, then only return values
                        partaining to that particular time index        

 History:
        Original: 25/2/00; SJT
        Move to pad_pad: 29/2/00; SJT
        Add index keyword: 7/3/00; SJT