looping through 2 .mat files

I have 2 matlab files with data in. Im trying to get my code to loop through both files and put the data into the 6 pre-assigned matrix.

I am getting the error:

Unable to perform assignment because the left and right sides have a different number of elements.

timestep = height(vel);
time_sec = timestep/100;
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 = 1:100000
load(files(a).name)
v = vel;
resGT(a) = sqrt(v(:,1).^2 +v(:,2).^2 + v(:,3).^2);
GT2 = resGT.^2;
GTflucc(a) = 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 

Answer 1

[Mathieu NOE]

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 

[C.G.]

Thank you, but I want it to save resGT and GTflucc for every file too

[Mathieu NOE]

No problema

clc
clearvars

% timestep = height(vel);
% time_sec = timestep/100;
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(:,a) = sqrt(v(:,1).^2 +v(:,2).^2 + v(:,3).^2);
    GT2(:,a) = (resGT(:,a)).^2;
    GTflucc(:,a) = sqrt(cumsum(GT2(:,a))./time_sec);
    %stats
    mean_GT(a) = mean(resGT(:,a));
    std_GT(a) = std(resGT(:,a));
    max_GT(a) = max(resGT(:,a));
    min_GT(a) = min(resGT(:,a));
end 

[C.G.]

I get this error if I run that:

Unable to perform assignment because the size of the left side is
100000-by-1 and the size of the right side is 100000-by-2.
 

[Mathieu NOE]

at which line do you get this error ?

[C.G.]

mean_GT(a) = mean(resGT);

[Mathieu NOE]

that's not my code

see above ( my last answer)

    %stats
    mean_GT(a) = mean(resGT(:,a));
    std_GT(a) = std(resGT(:,a));
    max_GT(a) = max(resGT(:,a));
    min_GT(a) = min(resGT(:,a));

[Mathieu NOE]

hello

problem solved ?

[Mathieu NOE]

hello

how is it going ?

problem solved ?

all the best