error:Subscript indices must either be real positive integers or logicals.....

a=('D:\TEST');      
b=dir(fullfile(a));         
L1=length(b);   
k=1;

for i=3:L1                

      c=dir(fullfile(a,b(i).name));        
      L2=length(c);

      for j=3:L2-3
          d=fullfile(a,b(i).name,c(j).name);  
          g1(k,:)={c(j).name}; 

          e=load(d);           

          n = e/2.5114;      
          x1=detrend(n);
          y=fft(x1);
          pow=y.*conj(y);
          l=length(y)/2;
          freq=(-l:l-1)*250/length(y);
          total_pow=sum(pow);

          pk=findpeaks(pow);
          k=max(pk);
          k1=k-0.001;
          [p2,k2]=findpeaks(pow,'MinPeakHeight',k1);
  %  Amax=max(p2);  
   k3=max(k2); 
   fmax=freq(k3);
   if ((fmax>24.5)&(total_pow>40))
       d1={'Event'};
   else
       d1={'Not Event'};
   end

         t(k,:)=[total_pow d1];
         k=k+1;

      end
  end

i am getting following error.....

>>new_seismic_first
Subscript indices must either be real positive integers or logicals.

Error in new_seismic_first (line 39)
       t(k,:)=[total_pow d1];

[Nicolas Gn]

k is not an integer or valid index for your array t.

I did not inspect your code in details but you can simply add a different counter such as u = 1; before your for loops and change it as t( u, :) and u = u+1; it should be enough.

[D S Parihar]

thank you Nicolas i got the mistake.

Answer 1

[Image Analyst]

If you still don't understand after reading the FAQ:

http://matlab.wikia.com/wiki/FAQ#How_do_I_fix_the_error_.22Subscript_indices_must_either_be_real_positive_integers_or_logicals..22.3F

then ask again.

Answer 2

[Walter Roberson]

findpeaks() applied to an empty signal would return empty, which is not a valid subscript.

The signal could be empty if the file is empty.