NANSTD same as STD but ignores NaN's. 
 NANSTD is OBSOLETE; use NaN/STD instead. NANSTD is included 
    to fix a bug in alternative implementations and to 
    provide some compatibility. 

 Y = nanstd(x, FLAG, [,DIM])
 
 x     data
 FLAG  0: [default] normalizes with (N-1), N = sample size
 FLAG  1: normalizes with N, N = sample size
 DIM	dimension
	1 sum of columns
	2 sum of rows
	default or []: first DIMENSION with more than 1 element
 Y	resulting standard deviation
 
 see also: SUM, SUMSKIPNAN, NANSUM, STD

Package: nan