MATLAB Crash Course for Beginners

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  • Опубликовано: 20 сен 2024

Комментарии • 348

  • @philparisi_
    @philparisi_ 11 месяцев назад +90

    💻🔥Continue your MATLAB learning with weekly programming tutorials on my personal channel 👉 youtube.com/@philparisi_
    Thank you for tuning in and supporting free programming education for all! Have a great week.

    • @beaniies
      @beaniies 10 месяцев назад

      Hi 👋 do you have a video on sort, search and insertion?

    • @philparisi_
      @philparisi_ 10 месяцев назад

      @@beaniies I'm always happy to make videos viewers recommend! can you send me a message regarding exactly what you are looking for? philsbeginnercode@gmail.com

    • @aswinkrish7667
      @aswinkrish7667 9 месяцев назад

      @@beaniies ask bing / gpt yet very helpful

  • @Martin201277
    @Martin201277 Год назад +406

    The perfect 'faster paced' intro to MatLab. Most other courses are too slow and dull while this one is just the right speed to keep you engaged while managing to keep up.

    • @philparisi_
      @philparisi_ Год назад +18

      Glad you enjoyed it! Plenty others topics covered on my channel as well.

    • @infiniteloops1879
      @infiniteloops1879 17 дней назад

      I watched it x2 speed and that was just perfect for me. I knew the very basics. I am also surprised to see that many argument vise operators are borrowed from shell scripting. A very good tutrial, thanks.

  • @roenbis
    @roenbis Год назад +209

    Oh man, thank you. You've covered an entire semester's worth of material in two hours. That's great!

    • @philparisi_
      @philparisi_ 11 месяцев назад +9

      Happy to help! I post weekly videos covering more topics as well on my channel for those interested!

  • @m.hosseinmahmoodi
    @m.hosseinmahmoodi 6 месяцев назад +43

    This was THE best "crash course" that I have watched. It really is a crash course, not a 10-hour tutorial that treats you like someone who never used a computer. This was one of only few Crash Courses that I finished.
    Thank you so much for treating us like an intelligent human being.

  • @calebhkelley
    @calebhkelley 9 месяцев назад +182

    Anyone else notice the embarrasing browser history item at 41:11? Excellent job, Phillip! Lol.

  • @sjfrench8034
    @sjfrench8034 Год назад +17

    One of the most senior members of the company that makes MATLAB is my dad, and my mom used to work there too. I came here because sometimes my parents will be talking about what's going on and I have no clue what they're saying. This was easy to understand - I doubt I'll be adding anything intellectual to any conversations but now maybe at least I won't be nodding along like "mhm mhm I totally get it but I don't think that teddy bear does so could you explain it all again in slightly simpler terms"

  • @MehulMehta-pm1mr
    @MehulMehta-pm1mr Месяц назад +6

    50:32 "Hold on" in graph plotting in matlab
    56:31 "Legend" in graph plotting in matlab
    1:02:43 "subplots" in graph plotting in matlab
    1:10:07 important concept in "Logic" in matlab

  • @thedeadman8361
    @thedeadman8361 Год назад +54

    I can already code in Python and R but I'm needing to do some stuff in MATLAB for my PhD. This was an excellent intro to familiarise myself with the basics of MATLAB. I found I was able to watch it at 2x speed and still keep up. Great stuff!

    • @philparisi_
      @philparisi_ 11 месяцев назад +8

      This is great to hear, thank you for tuning in and good luck on your journey!

    • @megatronreaction
      @megatronreaction 18 дней назад +1

      ​@@philparisi_ Awesome tutorial. keep up your witty joke dude.

    • @philparisi_
      @philparisi_ 16 дней назад +1

      @@megatronreaction will do :)

  • @sundarayerrapragada
    @sundarayerrapragada Год назад +87

    Most awaited lesson on MATLAB. Thanks a lot for the wonderful dedication to education.

    • @philparisi_
      @philparisi_ Год назад +4

      Thank you for watching and glad you enjoyed it! Have a great week.

  • @NahomTibebu-s3d
    @NahomTibebu-s3d 9 месяцев назад +9

    This is the best get to go video for learning MATHLAB in a very fast way. I don't I ever gave a comment for any video before but this is gold. Thank you.

  • @gravitysalad7891
    @gravitysalad7891 Год назад +7

    It doesn't really matter and I'm sure someone has already mentioned it, but if anyone's interested the problem at 1:06:25 can be solved by taking the sum of the widths of the intervals and dividing by the length of the total interval. The width of one interval is 2*((pi/2)-arcsin(0.8)) and there are two such intervals, so the percentage of y values > 0.8 is (4*((pi/2)-arcsin(0.8)))/10. A tiny bit more than 25.74% !

  • @Jay.xshgoel
    @Jay.xshgoel 6 месяцев назад +264

    Why do i even go to college

  • @kingarth0r
    @kingarth0r 2 дня назад +1

    I have a coding assessment with mathworks in today and I watched this tutorial at 3x speed to refresh and it's super helpful.

  • @PR03
    @PR03 Год назад +16

    Thanks for your great explanations, dear Phil. I just wanted to refresh my knowledge on Matlab but I should confess I've learned a lot .

    • @philparisi_
      @philparisi_ 11 месяцев назад

      Woohoo awesome :) check out my personal channel for weekly MATLAB videos, too!

  • @paulatapus2905
    @paulatapus2905 Год назад +10

    This video was so helpful and engaging. I got through the entire 2 hours and it was completely worth it. As someone who had to prior knowledge of MATLAB, he made it extremely easy to follow. Thank you so much for putting this video out!

  • @bishnudev1760
    @bishnudev1760 Год назад +24

    Most awaited course. Thank you ❤️

    • @philparisi_
      @philparisi_ 11 месяцев назад

      🙏🙏🙏 you are very welcome, thank you for supporting open programming education

  • @christossymA3A2
    @christossymA3A2 Год назад +261

    I was searching for copper and freecodecamp posted gold

    • @philparisi_
      @philparisi_ Год назад +9

      🤗🤗 thank you for watching!

    • @stephikebudu
      @stephikebudu Год назад

      My exact thought!

    • @abdullahahmed1673
      @abdullahahmed1673 Год назад +4

      @@philparisi_ you did this?! i can't thank you enough for this video, i have an exam in a week about Matlap and you sir saved me, thank you very very much

    • @hamza-cult
      @hamza-cult 6 месяцев назад

      I thought you were talking about Minecraft 😅

  • @Ragnarok540
    @Ragnarok540 Год назад +12

    The fun thing about Matlab is that pretty much everything here will apply to the open source alternative, Octave.

  • @HouseTre007
    @HouseTre007 9 месяцев назад +5

    This video is a great review for engineering students to watch at the end of their analysis and systems dynamics courses. You're an excellent teacher!

  • @benoitgauthier6089
    @benoitgauthier6089 Год назад +10

    You are amazing at this! Thank you so much for this great tutorial. The pace is perfect, the examples are very instructive and the amount of stuff covered in less than two hours is impressive!

    • @philparisi_
      @philparisi_ Год назад

      Thank you for tuning in and glad it was worth your time :) plenty more videos on my channel if you are interested!

  • @raulcasquinha
    @raulcasquinha Год назад +10

    I absolutely love every free code camp course, thank you for all the great tips

  • @robertoprestigiacomo253
    @robertoprestigiacomo253 Год назад +12

    Sometimes I miss Matlab. It reminds me of the time when I was a student.
    Realistically, once you're out of university, nobody cares about it and almost no company wants to pay for subscriptions when they can do the same things for free in Python, but for students this must be gold.

    • @anotheperspective
      @anotheperspective Год назад

      Thanks very much for this. I am in the dilemma of what application should i learn and carry out data analysis for my thesis on. My supervisor asked me to use Matlab, not python because many persons are using it already. Which other platform can you recommend for machine learning aside these two please?

    • @robertoprestigiacomo253
      @robertoprestigiacomo253 Год назад

      @@anotheperspective To complete data analysis tasks it doesn't really matter what you use. If you use Python for data analysis, you'll have to use the library Numpy (among other libraries) which works exactly like Matlab in the way it treats numbers and does calculation with matrices internally. Remember though that after you graduate and your Matlab student license expires and if you want to continue using it, it's not free and literally NOBODY uses it, whereas Python is free and required almost everywhere professionally.
      I think your supervisor refers to the academic world when he says "many persons". Nevertheless, I don't know your situation, if your supervisor means that there's some code written by others in your department that you can use, then it makes sense to go for Matlab. In general I'd trust my supervisor and use Matlab and don't worry about choosing because as I said, it's pretty easy to switch between Matlab and Python for data analysis. In Python there's even a IDE (Spyder) that has an interface that looks exactly like Matlab.
      I've never used Matlab for machine learning so I'm not familiar with its AI packages. Python is probably the most used tool for ML so you'll find tons of material on that. I don't know about Matlab. I'm not an expert in ML, so I don't know other options and how they compare to each other but for a thesis work I think Python or MAtlab are more than suitable options.

    • @Bobcoolyoung
      @Bobcoolyoung Год назад

      @@anotheperspective JavaScript is good as well for Machine Learning. Though the main programming language used together with Machine Learning in the world today is Python.

  • @user-Muhannad_Emad
    @user-Muhannad_Emad 5 месяцев назад +1

    عمل رائع جدا فصل دراسي كامل في ساعتين والكثير من المعلومات المهمة جدا
    انك عبقري جدا ❤❤❤❤

  • @Asta-7a-Vista
    @Asta-7a-Vista Год назад +7

    Very clear order of explanation of the material! Please continue to create courses in the future. Thank you.

  • @studyingasyouwere
    @studyingasyouwere Год назад +30

    I was wondering what the role of MATLAB in the industry these days. MATLAB seems like a great introductory language, but I have not seen it used outside Academia. I learned MATLAB as a student which was fun, but since then I enjoy other languages that are more common bit more. I love this channel by the way. I learned HTML & CSS on this channel and have been making some contents on it. Thank you - always appreciated! 🙌

    • @Tennyson999
      @Tennyson999 Год назад +1

      no idea. my engineer friends had classes for this. i did a degree in computer and none of the lecturers ever mention matlab.

    • @derstander
      @derstander Год назад +12

      A datapoint: I use MATLAB daily in my 9-to-5 job as an electrical engineer primarily doing signal processing. In my discipline at my organization, MATLAB is the primary tool although Python (with NumPy) has a small and growing presence.

    • @rezhaadriantanuharja3389
      @rezhaadriantanuharja3389 Год назад +6

      Mostly signal processing and control system related tasks. Actually, MATLAB is the only approved way to code something in most large corporations like mine (unless you want to use the monstrosity called VBA), since anything low level like C++ or open source like python are usually considered risky.
      Edit: large corporations that are not tech companies

    • @Martin201277
      @Martin201277 Год назад +9

      We use MatLab exceptionally in aerospace. Calculating/ simulating all the possible outcomes for aerodynamic principles, dynamic loading, thermal management etc. Theres so many variables and complex equations that could not be calculated/ simulated using anything other than programs like MatLab. Well it could, just would take a very, very long time...

    • @miv366
      @miv366 Год назад +2

      Depends on what you want to do, MATLAB is specific to certain industries like automotive and aerospace.
      Production is done only in MATLAB for some engineering applications, either because they are safety critical applications or MATLAB has a capabilities that other tools don't yet have (this edge is probably not going anyway any time soon).
      To answer your question, yes MATLAB and Simulink is still very much used in the industry today and has no proper alternative many of these areas. But if your interest is outside these areas, there not much value learning it. I would research your areas interest to know what tools are relevant.

  • @adieodds
    @adieodds Год назад +8

    It was a great journey! Thank you for a great delivery and simple explanations and thanks for not making us feel stupid 😄

  • @mayastiefel9487
    @mayastiefel9487 Год назад +6

    Really great video for beginners! Definitely gave me a good start to MATLAB and I can't wait to continue to learn

    • @philparisi_
      @philparisi_ 11 месяцев назад

      Thanks for tuning in! New MATLAB videos weekly on my personal channel :)

  • @simonnjoroge
    @simonnjoroge Год назад +5

    Thank you so much for this, couldn't have come a a better time.

  • @Vid4050
    @Vid4050 8 месяцев назад +4

    1:29:40 hit me deep in my heart man.

  • @Aba-abdelmasih
    @Aba-abdelmasih Год назад +4

    A course on node expressjs with postgresql would really be appreciated, I've been really struggling finding a good course with them

  • @craftjj
    @craftjj 11 месяцев назад +7

    41:11
    Still it's a very helpful and amazing tutorial. Thank you!

    • @kevinlonnestrom
      @kevinlonnestrom 9 месяцев назад

      LMAO I thought i was the only one!

  • @sagarpuri7838
    @sagarpuri7838 Год назад +2

    Long awaited for this one.

  • @Mbhargavkashyap
    @Mbhargavkashyap Год назад +2

    This is the pure gold! Loved it!

  • @AbubakarLawal-hp3bn
    @AbubakarLawal-hp3bn 7 месяцев назад +1

    u changed my life i will never forget u much love

  • @kazerzozay
    @kazerzozay Год назад +1

    Phil channel is great !! Highly recommended!

  • @pritampatil4669
    @pritampatil4669 Год назад +1

    Best MATLAB Crash Course on YT !

  • @syed_wahid
    @syed_wahid Год назад +2

    I start learning matlab when I see this video I am 2nd year electrical Engineering student you teaches like a fun 😊

    • @philparisi_
      @philparisi_ Год назад

      Glad you enjoyed the tutorial Syed! Good luck with your electrical engineering degree.

    • @syed_wahid
      @syed_wahid Год назад +1

      @@philparisi_ thanks

  • @66_subhangamdey_ece59
    @66_subhangamdey_ece59 Год назад +1

    rp = input('enter the passband ripple');
    rs = input('enter the stopband ripple');
    fp = input('énter the passband freq');
    fs = input('enter the stopband frequency');
    f = input('enter the sampling freq');
    wp = 2*fp/f; ws = 2*fs/f;
    num = -20*log10(sqrt(rp*rs))-13;
    dem = 14.6*(fs-fp)/f;
    n = ceil(num/dem);
    n1 = n+1;
    if(rem(n,2)==0)
    n1 = n;
    n = n-1;
    end
    y = boxcar(n1);
    b = fir1(n,wp,y);
    [h,o] = freqz(b,1,256);
    m = 20*log10(abs(h));
    subplot(2,2,1); plot(o/pi,m); ylabel('Gain in dB -->');
    xlabel('(b) Normailzed frequency --->');

  • @stefy2647
    @stefy2647 Год назад +1

    Been waiting for this. Thank you

  • @VictorGiustiniPerez_
    @VictorGiustiniPerez_ Год назад +3

    Amazing Course! Thanks so much! Also love to see Minecraft pinned in the task bar :)

    • @philparisi_
      @philparisi_ 11 месяцев назад +1

      the most important application :)

  • @IsYitzach
    @IsYitzach 6 месяцев назад

    1:42:00 The difference between the two methods is a common problem in scripted languages. Mathematica and Python do the same kind of thing. As a general rule of thumb, the more specialized the method used, the more likely it is to run quickly as it will make fewer calls to compiled code. If MATLAB could be compiled, both of those would ran in around 4 ms instead of 4 ms and 45 ms.

  • @bruny4194
    @bruny4194 Год назад +3

    Just today morning I had one of a few exams in Matlab.. wish this vid came few days earlier 😅😅 Great job anyway!

    • @spidvolem8276
      @spidvolem8276 Год назад

      Same lol

    • @philparisi_
      @philparisi_ Год назад +1

      Sorry this came after your big exam! The course has been live on my channel for a year. I publish other tutorials there if you are interested - ruclips.net/user/philsbeginnercode

  • @supersmog3029
    @supersmog3029 12 дней назад

    Thank you so much, this has helped me massively to get a head start on my dissertation for my final year

  • @Hesam_tajik
    @Hesam_tajik 6 месяцев назад

    Nice
    I’m studying data analytics and I shared your videos to all the students and my friends.
    Thank you for your efforts.

  • @HireHoffee
    @HireHoffee Год назад +1

    I need to write a diploma using matlab program, and here is your course, thanks

  • @dharanidharsoma
    @dharanidharsoma Год назад +1

    yay i was waiting for it from a very long time finally

  • @GEERTIOHULST
    @GEERTIOHULST 6 месяцев назад

    Thank you so much! I needed this because I'm taking a course outside of my regular study programme which requires some matlab knowledge, and this helped me get started!!

  • @usernameisamyth
    @usernameisamyth 7 месяцев назад +1

    thanks man... almost half way through!!!

  • @Tanlee29
    @Tanlee29 25 дней назад

    He is actually the best teacher ever!

  • @aashishsinghparihar6820
    @aashishsinghparihar6820 Год назад +1

    1st time I'll complete any course . It's just a beginning

    • @philparisi_
      @philparisi_ 11 месяцев назад

      Happy to hear it and job well done! I release weekly videos on my person channel if you are interested :)

  • @mattias3668
    @mattias3668 Год назад

    1:12:10: Actually, ~ is just to the left of the upper part of Enter, and must be combined with AltGr and followed by the Space or the same key combination. Looking at a British keyboard, it is just to the left of the lower part of Enter (combined with Shift). I guess, not everyone is an American.

  • @keegangovender3945
    @keegangovender3945 Год назад +2

    Thank you for this! Really helped me understand how to use MATLAB. Can I make a request to use Simulink and MATLAB together.

  • @adityavishwakarma5338
    @adityavishwakarma5338 Год назад +6

    I really wish this released two months earlier. But, thank you sooo much for this.

    • @BlackiJ11
      @BlackiJ11 Год назад

      Same here xd

    • @Gayatri_M.
      @Gayatri_M. Год назад

      Hi do you have any idea about quantitaive matlab need help in the same thank u

  • @sarab297
    @sarab297 Год назад +1

    Thank you for this easy-to-understand tutorial !

  • @ahmadromman6815
    @ahmadromman6815 Год назад +1

    no way!! you out did yourself with this guys!!

    • @philparisi_
      @philparisi_ Год назад +2

      Thank you for watching and glad you enjoyed it!

    • @ahmadromman6815
      @ahmadromman6815 Год назад +1

      @@philparisi_ I did. I watched it all. It was helpful

  • @ethanholmes5677
    @ethanholmes5677 8 месяцев назад

    Excellent tutorial. I have some pre-existing coding knowledge and this was the perfect way for me to get an overall grasp.

  • @stanleyconnor6898
    @stanleyconnor6898 Год назад +2

    Thanks guys for the decent free education!

  • @4k1ngs
    @4k1ngs 26 дней назад

    Amazing video, just started numerical methods and forgot a lot from the intro class😂

  • @jakubpika
    @jakubpika Год назад +1

    so nice to see your videos again! thanks!

    • @jakubpika
      @jakubpika Год назад

      @whatapp①②⓪③⑤④⑧⓪⑦⑧⑥ I dont see your number bro

  • @beingfit_
    @beingfit_ 7 месяцев назад

    great video. just started my journey with MATLAB with this tutorial

  • @SuperYtc1
    @SuperYtc1 10 месяцев назад

    1:48:00 I've never heard someone's computer in the background actually dying when this is demonstrated. XD This is the perfect demonstration of infinite while loops.

  • @theinjured4686
    @theinjured4686 7 месяцев назад +2

    41:10 Nice search history man 👍🏻

  • @MultiPtest
    @MultiPtest Год назад +2

    Valuable information!!!!! Thanks

  • @VikasVerma-bq1qy
    @VikasVerma-bq1qy Год назад +2

    Thank you very much for making this course

  • @sadekelkolei
    @sadekelkolei 4 месяца назад

    this cours covered so much , it was clear and easy to follow , thank you so much

  • @mi_thiran
    @mi_thiran Год назад

    Thanks for the clear explanations, trying the codes in parallel realy helps.

  • @user-cz5vr8dl2e
    @user-cz5vr8dl2e Год назад +1

    a very good needed lesson for matlab🤤thank you so much

    • @philparisi_
      @philparisi_ 11 месяцев назад

      you are very welcome :) more MATLAB videos on my personal channel as well if you are interested!

  • @Starlite4321
    @Starlite4321 Месяц назад

    Nice job Phil, thanks !

  • @bubblelaber4909
    @bubblelaber4909 Год назад +1

    I sooooo much needed this 😭

  • @SuperYtc1
    @SuperYtc1 10 месяцев назад

    48 mins so far, and it's really good. Nice work.

    • @SuperYtc1
      @SuperYtc1 10 месяцев назад

      Completed. Decent intro to MATLAB.

  • @Falco8649
    @Falco8649 6 месяцев назад

    a wonderful video, i was able to understand everything you said which is unlike any other video i've seen so far

  • @Babu_bha1
    @Babu_bha1 Год назад +2

    Thankyou for your great work guys

  • @PhotoVideoOrchestra
    @PhotoVideoOrchestra 10 месяцев назад

    Great job! Very clear explanations, you helped a lot. Thank you so much.

  • @slownetic6362
    @slownetic6362 9 месяцев назад +1

    41:11 search goes crazyy

  • @eminkilicaslan8945
    @eminkilicaslan8945 Год назад +4

    This is an awesome tutorial, I am 20 minutes in. But since I already learned Python Numpy, it feels learning Matlab is a bit redundant although it's in my curriculum.

  • @fireghost3359
    @fireghost3359 Год назад +1

    i need more advanced stuff than this now but this is gold for a beginner btw

    • @philparisi_
      @philparisi_ 11 месяцев назад

      Glad you liked my crash course! I am developing a playlist of intermediate tutorials that you may be interested in: ruclips.net/p/PLsLSMBRXdWJabi2kPXvmx2mYjAxIxGPRM

  • @MrSkylight24
    @MrSkylight24 Месяц назад

    Thank you so much for this informative tutorial....I have learned a lot.

  • @JoeWasFound1025
    @JoeWasFound1025 11 месяцев назад +1

    THE BEST. THANK YOU.

  • @laygupta3995
    @laygupta3995 10 месяцев назад

    This was a great help.
    Best way to let your fear of matlab go away❤

  • @kushagraagrawal9060
    @kushagraagrawal9060 Год назад +1

    Awesome video. Waiting for Tableau one

  • @ahlamouldkhesal5562
    @ahlamouldkhesal5562 6 месяцев назад

    very simple explanation and straight to the point really loved it ^^

  • @johnflanagan6367
    @johnflanagan6367 7 месяцев назад

    Excellent video for the fundamentals!

  • @GauravSingh-fw2xf
    @GauravSingh-fw2xf Год назад +1

    Is matlab even relevant today? Given the advancement in cloud compute and various open source libraries

  • @A1.b2.c3.d4abcd
    @A1.b2.c3.d4abcd Год назад +2

    🙏 Many thanks 🥰

  • @funniest4725
    @funniest4725 5 месяцев назад

    Double represent number with decimal point. int is for whole number integer

  • @mrunmaigaikwad5544
    @mrunmaigaikwad5544 10 месяцев назад

    Thank you so much for this wonderful crash course. it was very detailed and easy to understand

  • @oscaralvarezlemus4978
    @oscaralvarezlemus4978 2 месяца назад

    Thank you so much for the video, it's excellent and quite useful!

  • @owaisabdulmoeed7644
    @owaisabdulmoeed7644 10 месяцев назад

    Amazing. Thank you for this!

  • @Yan-os4ky
    @Yan-os4ky Месяц назад

    thank you so much for this video!

  • @arepitas5019
    @arepitas5019 7 месяцев назад

    Thank you for this!! Very helpful

  • @vigneshsubramanian07
    @vigneshsubramanian07 3 месяца назад

    Thank u so much , I had no idea about matlab, but after going through this, it really gives a way to make use of matlab easier . Can u please post video related to electronic using matlab

  • @amirhamza5497
    @amirhamza5497 9 месяцев назад

    Too good! Love it!

  • @peterwassmuth4014
    @peterwassmuth4014 4 месяца назад

    Awesome Thank you for Sharing! 💯✴

  • @kishorep4467
    @kishorep4467 7 месяцев назад

    Superb vedio ... It was very useful to the beginners...thanks a lot

  • @supercoder4863
    @supercoder4863 Год назад +2

    Can you make a Powershell scripting tutorial?
    Like the Powershell in windows (preferably Powershell 7).

  • @anuragkadam7935
    @anuragkadam7935 Год назад

    Love this video, thanks!!

  • @narendramauryaa
    @narendramauryaa Год назад

    Thanks SIr! Helped a lot.

  • @sameershaik4328
    @sameershaik4328 Год назад

    Thank you so much for this course. Kindly create a course on Simulink as well.

    • @Gayatri_M.
      @Gayatri_M. Год назад

      Hi do you have idea about quantitative matlab i need help in the same

    • @sameershaik4328
      @sameershaik4328 Год назад

      @@Gayatri_M. Haven't heard about it.

  • @utkarshpuri3739
    @utkarshpuri3739 Месяц назад

    Good person you are awesome!

  • @willieboy8798
    @willieboy8798 4 месяца назад

    very complete instruction ...i just wish this was available before i retired! uuuuuugh