How to plot cell arrays in a for loop?

I want to plot different graphs after load data from .wav or .avi files. The problem is because information is organized in cells that contains other cells. I tried to make different types of code but it didn't work, the last part is the plot code. So I hope you can help me This is my code:

files= dir('*.wav')
numfiles=length(files)
mydata= cell(numfiles,1);
info=cell(numfiles,1)
isFileSupported =  true(numfiles, 1) ;
for j=1:numfiles
  try
      info{j}=mmfileinfo(files(j).name)
      audio = info{j}.Audio
      video = info{j}.Video;
  catch ME
      isFileSupported(j) = false;
      continue;
  end
end
   supportedFiles = files(isFileSupported);
   for k=1:numel(supportedFiles)
       mydata{k}=importdata(supportedFiles(k).name);
   end

for j=1:numfiles

      H=mydata{k};
      x={:}
      y={:}
      plot(x,y)

end

Answer 1

[dpb]

for k=1:numel(supportedFiles)
  dat=importdata(supportedFiles(k).name);
  figure  % presume want a new figure for each file...
  plot(dat(:,1), dat(:,2:end))  % presume 1st column is x, any others are to be plotted
end

[Jose Peñaloza]

Hi!!! dpb I tried with your answer and the program showed me an error: ??? Error using ==> plot Not enough input arguments.

files= dir('*.avi')
numfiles=length(files)
mydata= cell(numfiles,1);
info=cell(numfiles,1)
isFileSupported =  true(numfiles, 1) ;
for j=1:numfiles
  try
      info{j}= mmfileinfo(files(j).name);
      audio = info{j}.Audio;
      video = info{j}.Video;
  catch ME
      isFileSupported(j) = false;
      continue;
  end
end
   supportedFiles = files(isFileSupported);
   for k=1:numel(supportedFiles)
       mydata{k}=importdata(supportedFiles(k).name);
   end

    for k=1:numel(supportedFiles)
    dat=importdata(supportedFiles(k).name);
    figure  
    plot(dat(:,1), dat(:,2:end))
  end

Thanks in advance :)

[dpb]

Use debugger and let us know what the result of numel(supportedFiles) and

which dat

after the importdata call. Needs must know what's you got; we have no data from which to work that lets us know what form any of the results are returned (or if any are, even).