Random Processes - 04 - Mean and Autocorrelation Function Example

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  • Опубликовано: 6 янв 2025

Комментарии • 110

  • @BronzyEgames
    @BronzyEgames 3 года назад +2

    God bless you soon much🙏🙏🙏.A video you made 6 years ago is helping me celebrate today, thanks so much for this🥳🥳🥳.

    • @AdamPanagos
      @AdamPanagos  3 года назад +2

      Thanks for the kind words, I’m glad you enjoyed the video! Make sure to check out my website adampanagos.org for additional content (600+ videos) you might find helpful. Thanks much, Adam

  • @jimmysantadeo2031
    @jimmysantadeo2031 7 лет назад +3

    Anyone that can explain a concept in a clear way definitely understands it, and YES YOU DO UNDERSTAND! LEGEND!

  • @usmanskp78
    @usmanskp78 6 лет назад +4

    Couldn't get more simpler and easy to digest! Bravo!

    • @AdamPanagos
      @AdamPanagos  6 лет назад +1

      Thanks for the kind words. Make sure to check out my website adampanagos.org where I have a lot of other videos and resources available that you might find helpful. Thanks, Adam.

  • @drewphillips8817
    @drewphillips8817 4 года назад +8

    Adam this is such a fantastic explanation. You have no idea how much this helped on my grad school final exam!

    • @AdamPanagos
      @AdamPanagos  3 года назад

      Glad I could help, thanks for watching. Make sure to check out my website adampanagos.org for additional content (600+ videos) you might find helpful. Thanks, Adam

  • @danieljamescarter565
    @danieljamescarter565 9 лет назад +34

    You made something complicated very simple to understand, a true engineer, what a boss!

    • @AdamPanagos
      @AdamPanagos  9 лет назад +3

      Daniel James Carter Thank you! Glad you liked the video.

  • @karennakye
    @karennakye 6 лет назад +4

    You are the best you simplified this for me...I went through tonnes of videos before I found this.

    • @AdamPanagos
      @AdamPanagos  6 лет назад

      Glad I could help, thanks for watching. Make sure to check out my website adampanagos.org for additional content you might find helpful. Thanks, Adam

  • @davidelias8569
    @davidelias8569 Год назад +1

    Thank you so much for these videos! Cannot begin to tell you how much these have helped me!

    • @AdamPanagos
      @AdamPanagos  7 месяцев назад +1

      Thanks for the kind words, I’m glad you enjoyed the video! Make sure to check out my website adampanagos.org for additional content (600+ videos) you might find helpful. Thanks much, Adam

  • @atogh
    @atogh 3 года назад +1

    You are a genius and We need more of your examples

    • @AdamPanagos
      @AdamPanagos  3 года назад +1

      Thank you for the kind words, I appreciate you watching. Make sure to check out my website adampanagos.org for additional content (600+ videos) you might find helpful. Thanks, Adam

    • @atogh
      @atogh 3 года назад +1

      @@AdamPanagos Done!!

  • @MLDawn
    @MLDawn 10 месяцев назад

    In 5:31, isn't that the formula for Covariance? I beliebe it needs to be divided by variance, if we want to get the correlation. Am I missing something?

  • @captainsquirtle4961
    @captainsquirtle4961 3 года назад

    Thank you so much!
    Searched for a good example of such calculations for quite a long time, could have saved me some hours if i found it earlier :D

    • @AdamPanagos
      @AdamPanagos  3 года назад

      You're very welcome, thanks for watching. Make sure to check out my website adampanagos.org for additional content (600+ videos) you might find helpful. Thanks, Adam.

  • @GiI11
    @GiI11 9 лет назад +1

    Great job man, this is incredibly clear. Now I see how autocorrelation is related to expectation values ;)

    • @AdamPanagos
      @AdamPanagos  9 лет назад

      +Sebastian Gil Glad it helped, thanks for the nice feedback.
      Adam

  • @toygarozel6261
    @toygarozel6261 3 года назад +1

    You are the best!!!

    • @AdamPanagos
      @AdamPanagos  3 года назад

      Thanks for the kind words, I’m glad you enjoyed the video! Make sure to check out my website adampanagos.org for additional content (600+ videos) you might find helpful. Thanks much, Adam

  • @manjitsingh1124
    @manjitsingh1124 6 лет назад +1

    Thank you so much for the lesson Adam 👍

    • @AdamPanagos
      @AdamPanagos  6 лет назад

      You're welcome, thanks for watching.
      Adam

  • @thesoftwareguy2183
    @thesoftwareguy2183 2 года назад +1

    how did you take the PDF of theta as 1/2pi ??

    • @AdamPanagos
      @AdamPanagos  2 года назад +1

      Theta is a uniform random variable on [-pi, pi], so it is a constant value of 1/2pi on that interval. That's just the definition of a uniform random variable. Hope that helps,
      Adam

    • @thesoftwareguy2183
      @thesoftwareguy2183 2 года назад

      @@AdamPanagos Oo Yeah , Got it . THANKS!!

  • @trioxyify
    @trioxyify 10 лет назад +20

    The trig-identity used above has a little mistake.
    sin(X)sin(Y) = (1/2) [ cos (X - Y) - cos (X + Y) ]

    • @AdamPanagos
      @AdamPanagos  10 лет назад +13

      Excellent catch! It ended up "not mattering" because that term eventually went to zero, but you're correct, it should have been a minus sign instead of a plus sign for the second term. I'll add an annotation to the video to correct it. Thanks for noting this!

    • @YohaneesHutagalung
      @YohaneesHutagalung 4 года назад

      Yes, that's right

    • @eengpriyasingh706
      @eengpriyasingh706 3 года назад

      Yess

  • @syedalaiyba5603
    @syedalaiyba5603 4 года назад +1

    Are you making currently more vedioz on stochastic processes

    • @AdamPanagos
      @AdamPanagos  4 года назад

      Yes, I know have a full course of these videos on my website: www.adampanagos.org/rp

  • @orcunozturk1
    @orcunozturk1 2 года назад

    Superman without a cape!

    • @AdamPanagos
      @AdamPanagos  2 года назад

      Thanks for the kind words, I’m glad you enjoyed the video! Make sure to check out my website adampanagos.org for additional content (600+ videos) you might find helpful. Thanks much, Adam

  • @marianasoder7828
    @marianasoder7828 3 года назад +1

    Salvou minha prova! Obrigada

    • @AdamPanagos
      @AdamPanagos  3 года назад +1

      Glad I could help, thanks for watching. Make sure to check out my website adampanagos.org for additional content (600+ videos) you might find helpful. Thanks, Adam

  • @loicturounet6533
    @loicturounet6533 3 года назад

    Hi! Do you know a good book of exercises/problems about stochastic processes with solutions? I would like to practice before my exam
    Thanks in advance

  • @Tschaegger79
    @Tschaegger79 4 года назад

    THX! Good explanation, saw the same problem elsewhere and it was calculated directly with the integral for the expactation. My question is, would it be a single or a double integral if you would write the integral for the expecation? Becaue X(t1) and X(t1) or two random variables.

  • @milindblaze4495
    @milindblaze4495 7 лет назад +1

    Amazing! So crisp!

  • @_blinder
    @_blinder 8 лет назад +3

    thank you, it really helped me.

    • @AdamPanagos
      @AdamPanagos  8 лет назад

      +Idroj17 Glad to hear that, thanks for watching!

  • @ramatbobby1815
    @ramatbobby1815 8 лет назад +1

    what if the value of x(t)=k where k is random variable uniformly distributed in range (-1,1) ???
    is it wide-sense stationary? or it is ergodic? if it is wide-sense stationary, what it is power??
    appreciate for your help sir!!!

  • @3xpo
    @3xpo 9 лет назад

    Thanks for all your videos

    • @AdamPanagos
      @AdamPanagos  9 лет назад

      You're welcome, I'm glad you like them. Thanks.

  • @cimaayoutube
    @cimaayoutube 3 года назад

    clean and clear!
    it very helped me
    thank u go a head.

    • @AdamPanagos
      @AdamPanagos  3 года назад

      Thanks for the kind words, I’m glad you enjoyed the video! Make sure to check out my website adampanagos.org for additional content (600+ videos) you might find helpful. Thanks much, Adam

  • @ismaeel1947
    @ismaeel1947 3 месяца назад

    where doest the 1/2pi come in

  • @rushalipandit7712
    @rushalipandit7712 3 года назад +1

    Thank you sir 🙏

    • @AdamPanagos
      @AdamPanagos  3 года назад +1

      You're very welcome, thanks for watching. Make sure to check out my website adampanagos.org for additional content (600+ videos) you might find helpful. Thanks, Adam.

  • @charisrevo7869
    @charisrevo7869 6 лет назад

    Thanks sir, but what if I put a constant A, Is it still independent?

  • @mohamedimamahmed344
    @mohamedimamahmed344 5 лет назад +1

    this is sooo helpfull thanks

    • @AdamPanagos
      @AdamPanagos  5 лет назад

      Glad I could help. Thanks for watching!

  • @justanordinaryviewer9873
    @justanordinaryviewer9873 6 лет назад +5

    the real mvp

    • @AdamPanagos
      @AdamPanagos  6 лет назад

      Thanks for the kind words and thanks for watching!

  • @muhammadnoman2635
    @muhammadnoman2635 6 лет назад +1

    Thanks, dear
    It is really helpful

    • @AdamPanagos
      @AdamPanagos  6 лет назад

      Glad I could help, thanks for watching!
      Adam

  • @tarunpower2516
    @tarunpower2516 7 лет назад +1

    good job.this was very helpful.

  • @danielrussell7877
    @danielrussell7877 8 лет назад +1

    is it ergodic?

  • @mingslif2
    @mingslif2 7 лет назад +1

    What a legend!

  • @liverpoolshivank
    @liverpoolshivank 9 лет назад

    Thanks a lot, this explains it really well.

    • @AdamPanagos
      @AdamPanagos  9 лет назад

      +Shivank Sharma Great, glad to have helped!

  • @이효건-o4o
    @이효건-o4o 8 лет назад

    this was very helpful! thanks for your help

  • @Jarrod_C
    @Jarrod_C 3 года назад

    Hey I am taking a Random Processes graduate course, and was wondering where I should begin on your channel and other channels. Thanks!
    Further, I have no signals background, so do I need to start from the very beginning or can I jump right into the concept of random processes?

    • @AdamPanagos
      @AdamPanagos  3 года назад +1

      I have videos for a complete graduate-level random processes course on my website here:
      www.adampanagos.org/rp
      The site also has a large amount of signals-and-systems material which would probably be best to start with as well. Hope that helps,
      Adam

  • @doesdu7728
    @doesdu7728 10 лет назад

    good explanation sir....good work

  • @gulfshores8548
    @gulfshores8548 9 лет назад +1

    Hi Adam. Thanks for a very helpful video. I was wondering what tablet and software did you use? For a long time I've been wanting to buy a thinkpad tablet to write lecture notes on for easy navigation instead of writing on a paper and then later losing them. The device and program that you are using for hand writing seems very neat.

    • @AdamPanagos
      @AdamPanagos  9 лет назад +6

      Gulf Shores I use an iPad app called Doceri (www.doceri.com) for most of my videos. This app lets you record all you handwriting ahead of time and use "breakpoints" to pause as needed. Once all the writing is down you can "play" the handwriting back while recording audio over it. I find this works much better than trying to write and talk at the same time. I'd definitely recommend checking out the app, I've found it very useful. Hope that helps!

  • @jchen2932
    @jchen2932 4 года назад

    dose a autocorrelation function of gamma process exist?

  • @N1NO5
    @N1NO5 7 лет назад +1

    Very Helpful !

    • @AdamPanagos
      @AdamPanagos  7 лет назад

      Glad I could help. Thanks for watching!

  • @sibusisomtiyane6913
    @sibusisomtiyane6913 7 лет назад +1

    Well explained thank you.

  • @aneeshathomas8049
    @aneeshathomas8049 5 лет назад +1

    Thank you....

    • @AdamPanagos
      @AdamPanagos  5 лет назад

      You're welcome, thanks for watching!

  • @43SunSon
    @43SunSon 8 лет назад +1

    good job, clean and clear.

    • @AdamPanagos
      @AdamPanagos  8 лет назад

      Thanks!

    • @43SunSon
      @43SunSon 8 лет назад

      Adam, do you have some videos about application of Autocorrelation? I mean, the example for real world. Thanks.

  • @vaishnav4035
    @vaishnav4035 4 года назад

    Why we use a different mathematical equation to find correlation when computing autocorrelation, why not normalised covarience?

    • @AdamPanagos
      @AdamPanagos  4 года назад

      I'm not sure if I understand your comment regarding the notation. The notation used here for the autocorrelation function is typical of all random process texts that I'm familiar with.

  • @neelabhtiwari9914
    @neelabhtiwari9914 7 лет назад

    Thanks a lot for this video.
    Can you also give a similar example on finding the auto-covariance function? Both of a general stochastic process and of a stationary increment schotastic process.
    Thanks.

  • @booked_society
    @booked_society Год назад

    How did 1/2 pie come

  • @mohammedalshali2690
    @mohammedalshali2690 10 лет назад

    Thank you very much.
    it is really helpful

    • @AdamPanagos
      @AdamPanagos  10 лет назад

      Glad to hear, thanks for the nice comment.

  • @desmondachunji4146
    @desmondachunji4146 5 лет назад +1

    good video, but if A is a random variable
    like you said y is it's expected value not computed

    • @AdamPanagos
      @AdamPanagos  5 лет назад

      It was computed. The mean of A was provided in the problem statement as muA.

  • @AsmaaSamir
    @AsmaaSamir 5 лет назад

    Thanks alot 😀

    • @AdamPanagos
      @AdamPanagos  5 лет назад +1

      You're welcome, glad I could help.

  • @aasthasinghmall
    @aasthasinghmall 9 лет назад

    thankyou .. it was helpful :)

    • @AdamPanagos
      @AdamPanagos  9 лет назад

      +AASTHA SINGH Great, glad it helped!

  • @namonarayanmeena8361
    @namonarayanmeena8361 6 лет назад +1

    Thanks a lot

    • @AdamPanagos
      @AdamPanagos  6 лет назад

      You’re welcome, thanks for watching. If you found the video useful make sure to check out my website adampanagos.org where I have a ton of other resources available. Thanks, Adam.

  • @mebrateshewa8221
    @mebrateshewa8221 5 лет назад +1

    thanks

  • @amyshai5177
    @amyshai5177 3 года назад

    life saver

    • @AdamPanagos
      @AdamPanagos  3 года назад

      Glad I could help, thanks for watching. Make sure to check out my website adampanagos.org for additional content (600+ videos) you might find helpful. Thanks, Adam

  • @lupgavgavu
    @lupgavgavu 3 года назад

    Hello dear,
    First of all thanks for these grat jobs.
    In 3.30, integration outcome (cos(wct+pi)-cos(wct-pi)) is determined -2. But should it be 0 ? İf i wrong, sorry.
    Thank you again.

    • @AdamPanagos
      @AdamPanagos  3 года назад

      No, it's definitely zero. The integration ends up equaling a term times sin(pi), and sin(pi) is zero. Hope that helps,
      Adam

  • @prasadkulkarni5442
    @prasadkulkarni5442 5 лет назад +1

    good

  • @siddragon5
    @siddragon5 8 лет назад

    hey! autocorrelation and correlation mean the same thing right?

    • @AdamPanagos
      @AdamPanagos  8 лет назад +5

      Essentially, yes. I like the term autocorrelation because I think it's a little more precise. It means correlating with oneself, hence the "auto" prefix. Crosscorrelation means correlating with something else.

    • @siddragon5
      @siddragon5 8 лет назад

      +Adam Panagos ohh! Understood! Thanx alot sir! :)

    • @siddragon5
      @siddragon5 8 лет назад

      +Adam Panagos ohh! Understood! Thanx alot sir! :)

  • @durgar9755
    @durgar9755 6 лет назад +1

    Why are we analysing random variables using these parameters

    • @AdamPanagos
      @AdamPanagos  6 лет назад

      All random variables have some statistical characteristics associated with them (i.e. some mean, some variance, etc.). The specific values chosen for this video weren't chosen for any particular reason, just to provide a specific example.
      Thanks for watching.
      Adam

  • @sarojsharma5974
    @sarojsharma5974 6 лет назад +1

    Can you please provide me the lectures on econophysics - Introduction
    I want to study this subject from start to end
    please help me in learning econophysics
    please provide the link

    • @AdamPanagos
      @AdamPanagos  6 лет назад

      Unfortunately, I've not studied that field in much detail myself so I don't think I'd be much help. Good luck though!