this code for feature extraction of speech recognition ,my path is D:\speech_​recognitio​n\database​\data1 .it contain error please help me

function TrainDataFeatures=EExtractionFeature; for n=1:10 for ex=1:43 [n ex]

        fichier=strcat('D:\speech_recognition\database\data',int2str(n),'\',int2str(n-1), '_',int2str(ex),'.wav');
        fichier=strcat('''',fichier,'''')
        [s,fs]=wavread(fichier);
        f=melcepst(s,fs);
        TrainDataFeatures(n,ex)={f};
    end
end