loop implementation with two conditions

I have a time series data sampled at 100 ms. I would like to pick samples every 1 sec or when difference between 2 consecutive samples is more than 10 and then implement a logic inside this condition. How do I use both these together as an 'if' condition?

Thanks!

[Guillaume]

"How do I use both these together as an 'if' condition?"

Most likely, if is the wrong tool. Can you give an example of "the logic inside this condition"?

[A VP]

I need not necessarily stick to an if-loop. Is there an alternate way to implement it?

The logic inside the condition is to store the samples in a new array.

Answer 1

[Guillaume]

Something like this would work:

samples = randi([0 20], 1, 1000);  %demo data   
indices1s = 1:100:numel(samples);  %indices at every 1 s
indicesdiff = find(abs(diff(samples)) > 10);  %indices of 1st sample when consecutive sample difference is greater than 10.

newsamples = samples(unique([indices1s, indicesdiff, indicesdiff+1]));  %indicesdiff+1 to get the 2nd of the two samples when diff is greater than 10

It's all vectorised operations, so no if needed.