p_cell.mat: 	image directory path, since we do not have the images this will be unnecessary.

pi_reg7.mat: 	class_number by sample_number matrix , M. 
		class_number =10, sample_number=2400

		If M(i,j)==1, 	j th sample belongs to i th class
		   M(i,j)==0,	j th sample is not used

pi_sel.mat:	1 by 2400 vector, vec.
		if vec(i)==1, i th sample is used.
		   vec(i)==0, i th sample is not used.	

temp1.mat:	voxel_number by sample_number matrix M.
		voxel_number=8142, sample_number=2400.
		each element of the matrix corresponds to the signal intensity measured at 
		the voxel at the corresponding sample time.

		M(i,j): Signal intensity value measured at the ith voxel, by the jth sample.

vXYZ.mat:	x_y_z_coordinates by voxel_number matrix.