MATLAB: Import multiple .dat files

filesimportmultiplenon-structurereference

Hello,
I've been struggling with this problem for several days now. Tried different solutions and I think I'm almost there, except for following error:
PROBLEM: I have a folder with 500 .dat files, they each consist of 1 header line with 40 variables (strings) and about 8000 lines with recorded integer data. I want to import them into matlab so I have 40 vectors of (500*8000) by (1).
I use this code:
function importfiles()
datfiles=dir('*.dat'); 
numfiles=length(datfiles);
%Import the files
for k=1:length(datfiles);
  newData1 = importdata(datfiles(k).name);
    A=newData1.data; %Create matrix A, with all data from the file 
    if k==1
        B=zeros(size(A));
        B=vertcat(B,A);
    else
        B=vertcat(B,A);  %vertically concatenates matrix A to B
    end
end
     B(all(B==0,2),:)=[];   %Delete all the zero lines
% Create new variables in the base workspace from those fields.
for i=1:size(newData1.colheaders, 2)
    assignin('base', genvarname(newData1.colheaders{i}), B(:,i));
end
When I execute this I get following error:
Attempt to reference field of non-structure array.
Error in importfiles (line 15) A=newData1.data;
!!!!When I execute for_ k=1:60;_ it works.!!!!!
What is causing this problem for k=1:(integer bigger than 60)???

Best Answer

Set
    dbstop if error
and inspect the values of the variables at line 15
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