How to pick data with fix moving window ?

Hi everyone,

May someone help me here...

I have a 366 data points. I am interested to pick 60 data points each time with a shift of 5 data points i.e. 1-60, 5-65, 10-70, 15-75 ..... 305-365.

Thank you.

Answer 1

[Mathieu NOE]

hello

create index vector with delta = 5 :

ind = min(data):5:max(data);

and use it to extract the corresponding data values :

data_out = data(ind);

[aa]

Thank for help.. I just try your propsoed method. Howver, it did not work for my case ...

my data set consists of 366 point, I am intrested to pick consective 60 data point with a shift of 5.

The output will be 61-by-60 matrix or 305-by-60 if the shift is 1.

I also attached the data for your reference.

Thank you.

[Mathieu NOE]

ok

i read your first request a bit too quickly !

I was about to send the code when I noticed that the way you split the data cannot give the same 60 points for all cases :

1-60 => length = 60

5-65 and al followers => length = 61

so we have to change either the lower or the upper limit (like 5-64 and not 5-65)

[Mathieu NOE]

so code should be :

data = readmatrix('data.txt');

buffer_length = 60;
k = 5; 
nb_loops = 1+fix((length(data)-buffer_length)/k);
% nb_loops = 62;
data_out = [];

for ci = 1:nb_loops
    ind_start = 1+(ci-1)*k;
    ind_stop = ind_start+buffer_length-1;
    ind = ind_start:1:ind_stop;
    data_out(:,ci) = data(ind);
end