How to filter the data as given below?

consider the following numbers.[.2,.8,55,67,689,47,105,.3,.45,67] kindly some one suggest me a program to pic the first two and remove next two..so my answer should be likely [.2,.8,689,47,.45,67]

Answer 1

[Guillaume]

The answer is exactly the same as your previous question. Use mod:

data = [.2,.8,55,67,689,47,105,.3,.45,67];
indices = 1:numel(data);
indices = indices(mod(indices-1, 4) < 2);
data(indices)

You need to take the time to understand the answers you're given.

[Ajay Parottil]

Thanks for your valuable suggestions.I understood the logic sir.But actually i got 1018536 values.and i need to pick the first 16428 and remove the next 16428 values........upto the last.The current logic will not work in it.The data file is also attached..Kindly suggest

[Guillaume]

You can change the number of values you want to pick and discard as much as you want, the logic is still the same. You just have to change the ratio for the modulo operation. (hint: it's twice the number of values you want to keep).