Make different matrix from loaded data separated by blank line

I can make matrix x and y from data.dat which is consist by 2 columns using this code:

load data.dat
x=data(:,1);
y=data(:,2);

what if i want to make matrix x1, x2, ... xn and the same with y, where x1, x2, are separated by blank line like this in the data.dat

54.510  1.420
55.294  1.819
55.859  1.935
55.999  2.381

9.017   1.600
9.518   1.916
9.868   2.217
9.896   2.368
10.113  2.533
10.424  2.552

....    ....

based on example data, I expect

x1=[54.510;55.294;55.859;55.999]
x2=[9.017;9.518;9.868;9.896;10.113;10.424]
y1=[1.420;1.819;1.935;2.381]
y2=[1.600;1.916;2.217;2.368;2.533;2.552]

Thank You

[Geoff Hayes]

Is there a pattern to the separation between to blocks of numbers or have you manually updated the text file to include a space? From the above, the pattern or rule seems to be to create a group for all numbers in the first column that are in ascending order. And as soon as we encounter a number that is less than the previous number (in that column) then we should create a new group. Is that the case?

[dpb]

...what if i want to make matrix x1, x2, ...

Short answer is "don't do that!!!

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F http://matlab.wikia.com/wiki/FAQ#Why_is_it_advised_to_avoid_using_the_.22eval.22_function.3F

[Joseph Cheng]

I would suggest using cells instead of having x1, x2 ... xn. such that x1 = x{1} and x2 = x{2}, so on and so on.

something along these lines.

x = 1:40;
spaces = [1 5 10 35]
spaces = [spaces length(x)+1]
for i =1:length(spaces)-1
X{i} = x(spaces(i):spaces(i+1)-1)
end

given you know where your "new" variable separators are.