It’s not possible to do it without a loop. The reason is that you have to do something similar to:
fidi = fopen( ... ,'rt');
k1 = 1;
while ~feof(fidi)
D{k1} = textscan(fidi, '%f%f%f%f', 'HeaderLines',4, 'CollectOutput',true);
fseek(fidi, 0, 0)
k1 = k1 + 1;
end
fclose(fidi)
The code will stop when it hits a text line, then with the fseek call it will advance to the next line, skip it and the next 3 header lines, then continue through until it encounters a valid ‘end-of-file’ indicator, then stop. If there is no valid ‘end-of-file’ indicator, this becomes an infinite loop, so be mindful of that possibility.
NOTE — This is UNTESTED CODE. It should work with appropriate modifications. You may need to add additional name-value pair arguments to the textscan call to make it work with your file.
