find values around peak

Hey guys,

i have a very simple question. I have a file/array with one million values and a peak. I need to find a way to get 5000 values around this peak in positive and negative direction. In the end i need an array with 10001 values in the direction from the original file/array.

thanks in advance

Answer 1

[Image Analyst]

Try this:

[maxValue, indexOfMax] = max(signal);
index1 = max([1, indexOfMax - 5000]); % Don't allow less than 1.
index2 = min([indexOfMax + 5000, length(signal)]); % Don't allow more than the length of your signal.
output = signal(index1 : index2); % Extract

If you have clipping because one index is outside the range, and you still need 10,000 elements, then you can take a few more steps to ensure that.