MATLAB: How convert cell array to matrix matlab

Question

for m=1:100
    Heart_pulse_arrays{m} = imresize(Heart_pulse_arrays{m}, [1 Lp_mean], 'bicubic');  
    Heart_pulse_arrays_values= Heart_pulse_arrays{m};
end

i want Heart_pulse_arrays_values matrix with size N X M

Answer 1

doc cell2mat...

Eg:

C = {[1],    [2 3 4];
     [5; 9], [6 7 8; 10 11 12]}
A = cell2mat(C) ;