MATLAB: Array manipulation

arrays

Hi,
I'm looking for a piece of code that will replace NaN values in an array with the value immidiatly on top of the NaN value, I have paste an example below where I have replaced the values one by one, but that can hardly be the best way. would appreciate any assistance.
PPP =
        2002
         NaN
         NaN
        2008
        2010
        2012
         NaN
        2016
        2018
        2020
PP =
        2002
        2002
        2002
        2008
        2010
        2012
        2012
        2016
        2018
        2020

Best Answer

while true
  K = find(isnan(PP),1,'first');
  if isempty(K); break; end
  PP(K) = PP(K-1);
end
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