Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

To find maxima and minima of a continuous-time signal we can use differentiation. I want to know how do we find maxima and minima of a discrete-time signal?

share|cite|improve this question
The answer probably depends on the signal. Do you have an example? – Gerry Myerson Feb 26 '13 at 11:17

You can still do the differentiation but numerically. Then the argument which indicates ablolutely minimum value is what you are after.

Other way would be to sort you data in descending order, if it is finite, and take the first element.

share|cite|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.