Storing first 200 points from 400 points

Hello,

I have a 700000x1 double array where I want to store the first 200 points from every 400 points into a new array. How can I do it?

e.g. Store 1 to 200 from 1 to 400 Store 401 to 600 from 401 to 800 Store 801 to 1000 from 801 to 1200 and so on

Answer 1

[James Tursa]

X = your vector
temp = reshape(X,400,[]);  % Get groups of 400 in columns
result = reshape(temp(1:200,:),1,[]);  % Pick off the first 200 rows and reshape