There is no direct solution for this, but you code it up quite easily:
% num is a vector of interested timesteps
function data = readdump(filename,num)
fid = fopen(filename,'r');
% This will be in for loop:
% for i=1:length(num)
tline = fgetl(fid);
% call to check num
if(checknum(fid,num,tline)) % reality pass num(i)
% call function to read data
% you can use the file structure knowledge to your advantage
% use textscan to skip lines and read data in the desired format
disp('Read Data');
else
% skip lines to the next ITEM (again , you can use textscan (again if you know the struture of the file and its consistent, then its simpler
disp('Skipping');
end
data = 0;
function out = checknum(fid,num,tline)
if(strcmp(tline,'ITEM: TIMESTEP'))
% read next line
c = textscan(fid,'%d',1);
if(c{1} == num)
out = true;
else
out = false;
end
end
