hello
had to modify a bit your code to make it work
try this :
clc
clearvars
% timestep = height(vel); % are not yet defined (after load only)
% time_sec = timestep/100; % idem
inputrate = 1;
%% Files
files = dir('*.mat');
num_files = length(files);
%% Data output
resGT = zeros(100000,2);
GTflucc = zeros(100000,2);
mean_GT = zeros(numel(files),1);
std_GT = zeros(numel(files),1);
max_GT = zeros(numel(files),1);
min_GT = zeros(numel(files),1);
for a = 1:num_files
load(files(a).name)
v = vel;
timestep = height(vel);
time_sec = timestep/100;
resGT = sqrt(v(:,1).^2 +v(:,2).^2 + v(:,3).^2);
GT2 = resGT.^2;
GTflucc = sqrt(cumsum(GT2)./time_sec);
%stats
mean_GT(a) = mean(resGT);
std_GT(a) = std(resGT);
max_GT(a) = max(resGT);
min_GT(a) = min(resGT);
end
