DIVIDING A SIGNAL INTO SHORTER SEGMENTS AND SAVING THEM

Hello, I have a signal of 30 minutes duration. It is a csv file. I want to divide it into non overlapping segments of 10 sec duration and save them as different recordings. The sampling frequency of the signal is 360 Hz. How can I achieve this in matlab?

[Jan]

Please, SSG_newbiecoder, unlock your caps-lock key. Upper-case means shouting in internet forums, and it is harder to read. Please edit the question and use the standard case as the other users in the forum do also.

Did you import the file already? Then your input is a vector or matrix. Is the wanted output a set of variables or files? What have you tried so far? Which specific problem do you have? Can post the current code?

[SSG_newbiecoder]

I have found a way to split the signal into 10s segments. It is not very sophisticated but it seems to be working. But I don't know how to save these segments as .csv files within the loop itself.

clc; close all; clear all;
t1=1;
t2=3600;
 X=xlsread('E:\data_Lab\MITBIH\edited\100.csv');
 X1=X(:,1);
while t2<= 651600
    new_seg=X1(t1:min(t2,length(X1)));
    t1=t1+3600;
    t2=t2+3600;
end

[Jan]

Omit the brute clear header "clc; close all; clear all;". In productive code this causes more trouble than it solves.

[SSG_newbiecoder]

@Jan Simon: OK thanks for the advise will do

[NICOLE MIN]

how can i segemnt a 1 hour length ech signal into 1 min 2 min and 5 min?

[NICOLE MIN]

how can i segment 1 hr length ecg signal into 1 min 2 min and 5 min. thanks

Answer 1

[Jan]

Folder = 'E:\data_Lab\MITBIH\edited\';
X  = xlsread('E:\data_Lab\MITBIH\edited\100.csv');
X1 = X(:,1);
t1 = 1;
t2 = 3600;
k  = 1;
while t2 <= 651600
  new_seg = X1(t1:min(t2,length(X1)));
  File    = sprintf('Part%04d.csv', k);
  csvwrite(fullfile(Folder, File), new_seg);
  t1 = t1 + 3600;
  t2 = t2 + 3600;
  k  = k + 1;
end

[SSG_newbiecoder]

@Jan Simon: Thank you :)

[kalana jayasekara]

can u plz tell me how to do exact same thing by input mp3 format file and take out put as mp3 file?

[Anusshree]

Can you please tell me how to divide a one hour .mat signal into 2 minute segments and store it in a seperate folder?