the way find the specific data select

i have a data sheet and just want specific data

and the data number is arithmetic sequenc

how can i select?

this is my code

data=load('aa.txt');
 i=25
 for
    i=i+62
 end
A=data(i,:);

Answer 1

[KSSV]

Read about MATLAB indexing an array. If you want data from 25 to 100, just use:

iwant = data(25:100,:) ; 

If you are looking to pick on some criteria, read about inequalitites. You can get indices using >, <, ==

[ahahah ah]

thanks you for answering but i want specific data not contiunous. like No.25 and No.87 and No.149 and so on,,, do i make a zeros array and insert?

[KSSV]

Make the indices into an array and extract.

idx = [25 87 149];
data = data(idx, :)