Statistics Toolbox

nanstd

Standard deviation ignoring NaNs

Syntax

• y = nanstd(X)
  

Description

y = nanstd(X) is the standard deviation computed by treating NaNs as missing values.

For vectors, nanstd(x) is the standard deviation of the non-NaN elements of x. For matrices, nanstd(X) is a row vector containing the standard deviations of the non-NaN elements in each column of X.

Example

• m = magic(3);
  m([1 6 8]) = [NaN NaN NaN]
  m =
     NaN     1     6
       3     5   NaN
       4   NaN     2
  nstd = nanstd(m)
  nstd =
      0.7071    2.8284    2.8284
  

See Also
nanmax, nanmin, nanmean, nanmedian, nansum

nanmin

nansum