obtain matrix for multiple files

I have this code which reshapes column vectors from the file 'B00049' into 4 different matrices for x y u v now i want to scale this for multiple files in a folder. How can i construct the for loop to process the matrices as for the 1 file

this is the code for 1 file

filename= 'B00049.dat'

delimiterIn= ' ';

headerlinesIn = 3;

A= importdata(filename,delimiterIn,headerlinesIn);

%% Matrices%%%%

c = 214;%columns

r = 134;%rows

x= zeros(r,c);

y= zeros(r,c);

u= zeros(r,c);

v= zeros(r,c);

%% Matrix population

for j=1:r x(j,:) = A.data((j-1)*c+1:j*c,1);

    y(j,:) = A.data((j-1)*c+1:j*c,2);

    u(j,:) = A.data((j-1)*c+1:j*c,3);

    v(j,:) = A.data((j-1)*c+1:j*c,4);
end

now I want to know how to 'for loop' for multiple files in a folder so it processes each one to obtain the 4 matrices for each. Anyone have an idea please

[Guillaume]

Note that as commented in your previous question, your matrix population loop is unneeded.