clear all
close all

filename = 'a.csv';
M = csvread(filename);

sampletime = 0.005
t_max = size(M,1) * sampletime;

t = linspace(0,t_max,size(M,1));


[~,M_d] = gradient( M,0.005);
[~,M_dd] = gradient( M_d,0.005);

figure();
subplot(3,1,1);
plot (t,M);
subplot(3,1,2);
plot (t,M_d);
subplot(3,1,3);
plot (t,M_dd);