I want to perform SVD on cell matrix. how to apply svd on bunch of matrix? or i have to apply svd on all single matrix? but I have so many matrix of different sizes. i have used cell function for that. now for apply svd please help me.

• here is my code:
• Tw = 40 ; Ts = 20; alpha = 0.97; M = 20; C = 6; L = 22; LF = 300; HF = 3700;
• filelist1=dir('*.wav');
• n=size(filelist1);
• P=cell(n);
• for k1=1:n
• filename1=filelist1(k1).name;
• [l1,fs1]=wavread(filename1);
• l1 = l1(:,1);
• P{k1} = ...
• mfcc( l1, fs1, Tw, Ts, alpha, @hamming, [LF HF], M, C+1, L );
• %[u s v]=svd(p); %[u s v]= svd(p(1))
• end

[Jan]

Please read: Format Code

Answer 1

[Jan]

Use numel instead of size, because the latter replies a vector and for k1=1:size(x) might not do what you expect.

 n = numel(filelist1);
 P = cell(1, n);  % cell(n) is a cell(n, n)
 for k1 = 1:n
   ...

Here you process the files in a loop already. Calculating the SVD in addition should be easy:

 S = cell(1, n);
 V = cell(1, n);
 D = cell(1, n);
 for k1 = 1:n
   ...
   if all(isfinite(P{k1}(:)))
     [S{k1}, V{k1}, D{k1}] = svd(P{k1});
   else
     ??? What ever you want.
   end
 end

[Pooja Patel]

it is showing error "Input to SVD must not contain NaN or Inf." how to solve it?

[Pooja Patel]

Hey Jan Simon, Thank you so much for your help. code is running properly. I had 15 files total and loop was stopping at 7th file. actually the problem was in 8th sound file. so i deleted that file and now your given code is running.

[Jan]

@Pooja: It depends on what you want the result to be. And SVD is not defined mathematically, if the input contains NaNs or Infs. What do you want as output in these cases? See [EDITED]