How to play Audio File

A= testing;

B= [ten;
    twenty;
    fifty;
    hundered;
    fivehundered;
    thousand];

G={'ten';
    'twenty';
    'fifty';
    'hundered';
    'five_hundered';
    'thousand'};
class=knnclassify(A,B,G);
disp(class);
pathss=class
for index = 1:numel(pathss)
    temp=pathss{index}
end
%    [rows]=testing;
% for i=1:rows 

if (temp=='ten')
    a=wavread('stopsign.wav');
      wavplay(a,44100);

% end 
% end
% TF=strcmp(temp,ten)
% for index = 1:numel(pathss)
%     temp1=pathss{index}
%     
elseif (temp=='twenty')
  a=wavread('crossroad.wav');
      wavplay(a,44100);
elseif (temp=='fifty')
  a=wavread('crossroad.wav');
      wavplay(a,44100);
      elseif (temp=='hundered')
  a=wavread('crossroad.wav');
      wavplay(a,44100);
      elseif (temp=='five_hundered')
  a=wavread('crossroad.wav');
      wavplay(a,44100);
      elseif (temp=='thousand')
  a=wavread('crossroad.wav');
      wavplay(a,44100);
end
end

This is a knnclassifer which i am using.It gets classifed into correct group but the audio file doesnt play.Whats the problem in here?

Answer 1

[Walter Roberson]

You should not be using "==" to compare strings. You should be using strcmp()

[B.k Sumedha]

I used .But no use :(. can u help See this line commented in my above code

% TF=strcmp(temp,ten)

[Walter Roberson]

Do not name a variable "class". "class" is an important MATLAB routine.

Your code

for index = 1:numel(pathss)
    temp=pathss{index}
end

assigns to temp and overwrites the result in the next iteration. The result is the same as if you had just done

temp = pathss{end};

The results would be the same if you only have a single sample in "testing" to classify, but in that case you would simply use

temp = pathss{1};

If you do have multiple samples to classify, then why would you be choosing the last one to play audio about? If you are only going to use the information about the last sample then why bother to classify the other samples?

What you have in your comments does not concern me. Your code tries to compare strings using "==", and that is going to fail.

You should be converting your code to use audioread() and audioplay() instead of wavread() and wavplay(), but that would not affect whether the audio comes out in existing releases. Having the wrong comparison operator for strings would cause audio to fail to come out, as MATLAB will error() out the code when you try to use "==" to compare strings of different lengths.

[B.k Sumedha]

Thanks Walter:).. Well i used the strcmp and it gave me the output.