MATLAB: Suppose you have a 2d matrix M. And you have certain indexes where the data is not good.SO you want to fill those indexes by the nearest existing value.Can regionfill be used for this

matrixmatrix manipulationregionfill

M=magic(10)
index=[7,8,,5,9,45,43,23,34]
M(index)=nan
Now how to fill up those Nan values such that it contains the nearest existing value
AND
 second average of nearest existing values

Best Answer

You can use fillmissing: https://www.mathworks.com/help/matlab/ref/fillmissing.html
>> x = [7,8,NaN,5,9,45,43,23,34,NaN,NaN,100]
x =
   7     8   NaN     5     9    45    43    23    34   NaN   NaN   100
>> fillmissing(x,'nearest')
ans =
   7     8     5     5     9    45    43    23    34    34   100   100
>> fillmissing(x,'linear')
ans =
  7.0000    8.0000    6.5000    5.0000    9.0000   45.0000   43.0000   23.0000   34.0000   56.0000   78.0000  100.0000
- Sebastian
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