public static AFArray StdDev(AFArray arr, int dim)
        {
            IntPtr ptr;

            Internal.VERIFY(AFStatistics.af_stdev(out ptr, arr._ptr, dim));
            return(new AFArray(ptr));
        }
        public static SuperArray StdDev(SuperArray arr, uint dim)
        {
            AFArray y = CreateMajorSupportedArray(arr);
            IntPtr  ptr;

            Internal.VERIFY(AFStatistics.af_stdev(out ptr, y._ptr, dim));
            return(new SuperArray(new AFArray(ptr)));
        }