Error in the specification of the window when using movmad

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Tiago Dias 2018-6-6

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https://ww2.mathworks.cn/matlabcentral/answers/404377-error-in-the-specification-of-the-window-when-using-movmad

评论： Walter Roberson 2018-6-7

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Hello,

I got a matrix called "A" [nxm], where n is the number of observations and m is the number of variables.

I want to perform a movmean and movmedian, but instead of use the size of the window kb and kf the same for all the variables, i created a matrix B [1xm], with the values of "k" to use for each variable of the matrix table

the code to do this should be?

      n = 969120;
      m = 41;
      result1 = NaN(n,m);
      result2 = NaN(n,m);
      for j = 1:m
      for j = 1:n
      result1(i,j) = movmad(A(i,j),[B(1,j) B(1,j)],'omitnan');
      result2(i,j) = movmedian(A(i,j),[B(1,j) B(1,j)],'omitnan');
      end
      end

because when i run this in a script, i get the following error:

"error using movmad, window length must be a finite positive scalar or 2-element vector of finite nonnegative scalars"

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Walter Roberson 2018-6-6

You still have the difficulty that you appear to be apply movmad() and movmedian() to scalar numerics.

Tiago Dias 2018-6-6

i don't understand that, could you use an example?

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回答（1 个）

Walter Roberson 2018-6-6

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/404377-error-in-the-specification-of-the-window-when-using-movmad#answer_323549

编辑：Walter Roberson 2018-6-6

在 MATLAB Online 中打开

      if any(isnan(B)) || any(B(<0)) || any(B~=floor(B))
        error('B must be non-negative integers');
      end
      n = 969120;
      m = 41;
      result1 = NaN(n,m);
      result2 = NaN(n,m);
      for i = 1:n
        result1(i,:) = movmad(A(i,:), [B(i) B(i)], 'omitnan');
        result2(i,:) = movmedian(A(i,:), [B(i) B(i)], 'omitnan');
      end

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Tiago Dias 2018-6-6

Perhaps i am mistaken, but what i want to do is to applot movmad for the 1st column of A with the 1st value of B, then movmad to the 2nd column of A the 2nd value of B.

and what o wrote applies in rows no?

Walter Roberson 2018-6-7

在 MATLAB Online 中打开

      if any(isnan(B)) || any(B(<0)) || any(B~=floor(B))
        error('B must be non-negative integers');
      end
      n = 969120;
      m = 41;
      result1 = NaN(n,m);
      result2 = NaN(n,m);
      for i = 1:m
        result1(:,i) = movmad(A(:,i), [B(i) B(i)], 'omitnan');
        result2(:,i) = movmedian(A(:,i), [B(i) B(i)], 'omitnan');
      end