error with results, matlab

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Monika 2014-1-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/113200-error-with-results-matlab

评论： Monika 2014-1-22

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

Where is error? My program showed my only WYKRYTO, but I don't know what.

fprintf('\nWYKRYTO: ');
if (kaszel == max([kaszel, smiech, krzyk, chrzakanie]))
       fprintf('kaszel');
     elseif (smiech == max([kaszel, smiech, krzyk, chrzakanie]))
        fprintf('smiech');
     elseif (krzyk == max([kaszel, smiech, krzyk, chrzakanie]))
        fprintf('krzyk');
    elseif (chrzakanie == max([kaszel, smiech, krzyk, chrzakanie]))
      fprintf('chrzakanie');
    end

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Monika 2014-1-21

编辑：Walter Roberson 2014-1-21

在 MATLAB Online 中打开

Size of my signal is depends on which signal will be my input. I have 64 signals. I can make 64 different inputs.

>> disp(class(kaszel))
double
>> size(kaszel)
ans =
   107    13
>> size(smiech)
ans =
   107    13
>> size(krzyk)
ans =
   107    13
>> , size(chrzakanie)
ans =
   107    13

Monika 2014-1-21

编辑：Walter Roberson 2014-1-22

在 MATLAB Online 中打开

My teacher told me, that I can the above code I can write in two lines.

[junk classID(i)] = max([sum(kaszel) 
acc = sum(classID==labels)/length(labels)

But I don't know, how I should use acc

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采纳的回答

Walter Roberson 2014-1-21

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/113200-error-with-results-matlab#answer_121735

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max([array1, array2])

means

max(horzcat(array1, array2))

which in turn means

max(horzcat(array1, array2), [], 1)

which will calculate the column-by-column maximum of horzcat(array1, array2), which is going to give you a result which is 1 x (size(array1,2) + size(array2,2)) .

And then you try to compare the entire array array1 to the result of the max(), so you are comparing

size(array1,1) x size(array1,2)

1 x (size(array1,2) + size(array2,2))

and you can see by examination that the only way that can work is if array1 only has a single row and array2 is empty. (Well, that case would be treated differently by MATLAB, but you would still end up with mismatched lengths for the comparison)

Taking into account that you have entire arrays to be compared, what do you want your output to be? A 2D cell array of strings that indicates at each location which of the four arrays was the maximum at that point ? Or do you wish to know which of the four has the greatest average magnitude? Or something else?

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Walter Roberson 2014-1-22

Please show your current code fragment.

Monika 2014-1-22

在 MATLAB Online 中打开

    fprintf('\nObliczone wartości prawdopodobieństwa przynależenia do poszczególnych klas:\n');
          fprintf('Kaszel: %d\nŚmiech: %d\nKrzyk: %d\nChrząkanie: %d\n',kaszel,smiech,krzyk,chrzakanie);
          fprintf('\nProbka: %s',pliki(numer_pliku).klasa);
          wavplay(sygnal,Fs);
         fprintf('\nWYKRYTO: ');
         T = cat(3, kaszel, smiech, krzyk, chrzakanie);
  [maxval, IDs] = max(T, [], 3);
  accumarray(IDs(:), 1)
          fprintf('\n======================================================================');
      end
      fprintf('Zakończono działania skryptu\n');
     else
      fprintf('Niewystarczająca liczba próbek aby wyznaczyć GMM!');
      fprintf('\nNaciśnij dowolny klawisz, aby kontynuować...');
      pause;
      rozpoznawanie_dzwiekow;
end