In your case you want to parse all lines containing just numbers into an array (which you may later want to split by e.g.: Px = data(:,1) etc.). Providing all data lines hold the same number of entries, this should do the trick:
fid = fopen('Carolyn.txt');
c = textscan(fid,'%s','delimiter','\n');
fclose(fid);
lines = c{1};
data = [];
for i = 1:length(lines)
if ~isempty(lines{i})
parsenumbers = textscan(lines{i},'%f');
numbers = parsenumbers{1};
if ~isempty(numbers) % Line consists of numbers
data = [data;numbers'];
end
end
end
