how to read data file with rows of different length

I have a file, each row has different number of numbers, like

 1 2 2 3
 12 3 4 5 5 9
 1 3
 0.5 0.002 0.02

I tried importdata, but it seems to divide a row into two rows any other methods? thanks

Answer 1

[Azzi Abdelmalek]

fid = fopen('file1.txt');
line1 = fgetl(fid);
res=line1;
while ischar(line1)
line1 = fgetl(fid);
res =char(res,line1)
end
fclose(fid);
for k=1:size(res,1)
  A{k}=str2num(res(k,:))
end

Answer 2

[Image Analyst]

Try this:

fid = fopen('data.txt');
textLine = fgets(fid); % Read first line.
lineCounter = 1;
while ischar(textLine)
    fprintf('\nLine #%d of text = %s\n', lineCounter, textLine);
  % get into numbers array.
  numbers = sscanf(textLine, '%f ')
  % Put numbers into a cell array IF and only if
  % you need them after the loop has exited.
  % First method - each number in one cell.
  for k = 1 : length(numbers)
    ca{lineCounter, k} = numbers(k);
  end
  % ALternate way where the whole array is in one cell.
  ca2{lineCounter} = numbers;
  
  % Read the next line.
    textLine = fgets(fid);
  lineCounter = lineCounter + 1;
end
fclose(fid);
% Display the cell arrays in the command line.
ca
ca2

In the command window:

ca = 
    [  1]    [    2]    [   2]    [3]     []     []
    [ 12]    [    3]    [   4]    [5]    [5]    [9]
    [  1]    [    3]        []     []     []     []
    [0.5]    [0.002]    [0.02]     []     []     []
ca2 = 
    [4x1 double]    [6x1 double]    [2x1 double]    [3x1 double]