How can I jackknife using this code and then plot it?

%Simulate the Ising Model for K and N_side.
clear all;

% define K vector
K = 0.1:0.05:0.6;

% define blerg
N_side = 40; %Number of spins on a side
N_Moves = 10^6; % was 10^7
sampling_frequency = 100; % was 10000

% define container for traj data
K_output = zeros(1,length(K));

count=1;
% loop over various K
for ii = K

ising = Initalize(ii,N_side);
traj = Trajectory(ising,N_Moves,sampling_frequency);
[E,M] = ExtractTrajectory(traj);
% mov = Visualize(traj);

K_output(count) = M(end);
count = count+1;

end