Try this:
while ~feof(fid)
i = i + 1;
linha = fgetl(fid);
% Break if the line is empty and we won't be able to get 4 numbers from it.
if isempty(linha)
break; % Break ot of the while.
end
% If we get to here, the line is good and we should be able to get our
% numbers using the poster's original code (hopefully).
for k = 1:4
%linha(1) = []; % Not needed.
[valor, linha] = strtok(linha, ',)');
matriz(i,k) = str2double(valor);
end
end
