Fuzzy Logic

author: Michael Berthold, Department of Computer and Information Science, University of Konstanz
published: Feb. 25, 2007,   recorded: June 2005,   views: 55289


Related content

Report a problem or upload files

If you have found a problem with this lecture or would like to send us extra material, articles, exercises, etc., please use our ticket system to describe your request and upload the data.
Enter your e-mail into the 'Cc' field, and we will keep you updated with your request's status.
Lecture popularity: You need to login to cast your vote.
  Delicious Bibliography

 Watch videos:   (click on thumbnail to launch)

Watch Part 1
Part 1 54:40
Watch Part 2
Part 2 48:13


The tutorial will introduce the basics of fuzzy logic for data analysis. Fuzzy Logic can be used to model and deal with imprecise information, such as inexact measurements or available expert knowledge in the form of verbal descriptions. We will first introduce the concepts of fuzzy sets, degrees of membership and fuzzy set operators. After discussions on fuzzy numbers and arithmetic operations using them, the focus will shift to fuzzy rules and how such systems of rules can be derived from available data.

Link this page

Would you like to put a link to this lecture on your homepage?
Go ahead! Copy the HTML snippet !

Reviews and comments:

Comment1 Z., July 19, 2007 at 8:51 p.m.:

is there part 2 available???
(btw: this is a lecture I was looking for for ages :) )

Comment2 Teresa, July 20, 2007 at 1:39 a.m.:

The lesson I was waiting for too :)
Glad to have found it! May I ask some questions?

Comment3 Miguel, August 23, 2007 at 5:23 p.m.:

It'd would be nice having a Flashbased version, I'm having problems playing the wmv on Ubuntu Linux.

Comment4 Aswani Kumar, August 31, 2007 at 12:51 p.m.:

The lecture in nice. I would like to download this lecture. Please give me this option as our Internet connection is very weak and we cannt have continous lecture over net.

Comment5 noora, October 1, 2007 at 3:52 p.m.:

Thanks :)

Comment6 H K, October 14, 2007 at 7:24 p.m.:

due to slow net speed i m unable to see it plz provide links to download these lectures

Comment7 mohamed.fezari@uwe.ac.uk, October 20, 2007 at 1:35 p.m.:

theses lectures are veri interesting for african and midle-east researchers who can niot attend conferences in USA or EUrope
Many Thanks

Comment8 Sarayut Nonsiri, October 20, 2007 at 6:58 p.m.:

Thank you very much.

Comment9 asma, October 23, 2007 at 9:52 p.m.:

plz provide links to download the lectures

Comment10 Vinh, November 13, 2007 at 4:44 a.m.:

Its hard for mac/linux users which don't have windows media player available. Do I have to buy windows now to watch?

It's ironical in a way. Exchange Ideas and Share Knowledge...but only if you run windows.

Comment11 Shanky, November 22, 2007 at 10:16 p.m.:

links are not working on linux (using mplayer plugin for mozilla) ,, :-( ,plz tell me if a downlodable version is availbale ..

Comment12 sintayehu zewdu, December 26, 2007 at 10:21 a.m.:

it is so cool and interesting so please go ahead

Comment13 Fathi Gasir, January 1, 2008 at 6:30 p.m.:

Thank you very much.

Comment14 avra, January 9, 2008 at 3:55 a.m.:

Google around for some streaming video downloader. Then convert WM video to whatever video extension you can see in your host OS.

Comment15 DAVIS THOMAS.K, January 11, 2008 at 5:37 p.m.:

Thaks a lot.. it really helped me for my project

Comment16 Alireza, January 17, 2008 at 7:12 p.m.:

These Good lectures Very better if downloadable

Comment17 Oleg Sakharov, February 7, 2008 at 8:57 p.m.:

Very very nice lectures! Really looks like you are in a university sitting and hearing all this stuff. Easy understandable and good presented. This site is amazing! I'd recommend it for all!

Comment18 sari, April 2, 2008 at 6:41 a.m.:

I learnt alot about fuzzy logic from this lecture. Is it possible to down load the lecture and how?

Comment19 Saad, May 23, 2008 at 11:30 a.m.:

Very nice..Beautiful way to teach basics..but Cameraman sometimes focus teacher while teacher is explaining something on board..so please keep camera on board at such times..thanks a lot anyway

Comment20 theabsurd, June 1, 2008 at 8:37 a.m.:

JW Player is buggy, please replace it with smth else, or provide download links.

Comment21 hameed, June 20, 2008 at 9:55 p.m.:

i need help
i need how i can buid tempreature project by fuzzy logic controller in matlab
if any one help me this is me email

Comment22 srs, July 21, 2008 at 11:40 a.m.:

I would like to download the video. How to do it?
Thank You Very Much

Comment23 saeideh, August 22, 2008 at 9:22 p.m.:

I really thank you for this usefull lecture which help me to do my project with fuzzy set.
also the slides, quality and facilities in the site is perfect.

Comment24 john, September 18, 2008 at 5:27 a.m.:

Vdery useful and well presented. Thank you.

Comment25 karthik, September 20, 2008 at 5:25 p.m.:

need complete video of part 1

Comment26 Shirke, September 24, 2008 at 10:12 a.m.:

I am unable to see. Can I download it?

Comment27 saif, September 24, 2008 at 12:02 p.m.:

amazing !!!

Does anyone know how to download these lectures?

Plez send me the tips (if you know)
so that i can download these great lectures.


Comment28 Mulugeta, October 14, 2008 at 2:25 a.m.:

what a brilliant idea! It helps so much indeed.
But lecture slides( from the video) has to be seen to the audience as well.
Thank you

Comment29 Aditya, November 22, 2008 at 5:32 a.m.:

Download the software "Replay Media Capture 3.1" to download videos from this site

Comment30 trgopan, December 28, 2008 at 3:46 a.m.:

thank you sir

Comment31 piero, January 5, 2009 at 8:12 p.m.:

I'm having some problems for watching the video!
"Stream not found: acai05_berthold_fl.flv"

Comment32 Toy, January 16, 2009 at 9:48 a.m.:

very good

Comment33 Youness, February 25, 2009 at 1:14 a.m.:

Hi, I can't download the lectures, What can I do to download it, because I need it.Help me please.I am student too,and I don't have money.
Thank you very much

Comment34 Pablo, April 8, 2009 at 10:04 p.m.:

People complaining about free lectures, about OpenCourseWare Courses... The cam is not moving the way I would like it... the guy talks so fast, so slow, it's so easy, so hard to follow... please!!! Just Wake up!!!
10 years ago this kind of things were just impossible, and now you have it just by a 10 secconds' search at google...
If you want a better quality course just go and pay for it...
I think this is great, and this lecture in particular is so clear... I'm going to find the way to download it... Thank you everyone who made it possible!!!

Comment35 Modi Salah, June 7, 2009 at 1:45 a.m.:

i'm glad that i came a cross this lecture .... i've been suffering for a while now :)

loads of thanx for everyone made it possibile for us as to watch and learn from this lecture and keep up the good work

Comment36 John Kelly, July 1, 2009 at 10:54 p.m.:

I see many references asking if videos can be downloaded, is this possible ?

Comment37 vimala, July 14, 2009 at 3:20 p.m.:

during the lectures at some instances the cameraman instead of focussing on the board he tried to focus on the teacher.so we were unable to see where the teacher was focussing on the board

Comment38 A.Jafarian, July 15, 2009 at 5:22 a.m.:

I really enjoyed every section of this video lecture.
Thank you Mr Michael Berthold.

Comment39 anuran, July 15, 2009 at 1:58 p.m.:

nice lecture...but no download options!!!!
jm player sucks!!!

Comment40 Michael Berthold, July 15, 2009 at 3:54 p.m.:

vimala sahi bolti hai , the camera man screwed up .

Comment41 zama, August 11, 2009 at 9:37 a.m.:

no comment.

Comment42 AKHTAR, September 3, 2009 at 9:23 a.m.:

It is very useful link.Is it possibe to get an email of expert about fuzzy loic?

Comment43 vachhani, September 17, 2009 at 5:45 p.m.:

it is very nice lecture and i would like to download this lecture for study please give permission thanks

Comment44 Rupen, September 25, 2009 at 3:12 a.m.:

Well, the lecture looks good, however, I have not understood the concepts of these neural networks and fuzzy logic on data analysis area. If we use the same data to model itself, then the question is what we are actually modeling - these simply turn out to be nothing but simply some form of advanced curve fitting tools. The most important feature would be if these tools can give us satisfactory modeling of some variables such as heat transfer coeffecient that cannot be measured easily from some other easily measurable variables, then only it makes sense. If it is the case of estimation and cross validation where the estimation depends on measured quantities, then modeling can be easily achieved such as using some dimensionless physical numbers and why we need the fuzzy logic or neural network in such cases, it is not clear yet.

Comment45 Srinivas.Yellamelli, October 7, 2009 at 7:32 a.m.:

hi sir /madam
these lectures are very impressive and informative for different concepts.Please provide more lectures in nn&fl please.
thank you

Comment46 fatma , October 29, 2009 at 1:03 p.m.:

nice lictures ,can I attached them to my power point presentation

Comment47 Layla Abdullahi , January 13, 2010 at 2:07 p.m.:

please let me to dowload it. or send me Above email if you can.
thank you.

Comment48 wajeed, January 15, 2010 at 11:34 a.m.:

I am not able to view the lectures. I have a message server not available. Please tell me when can they be available

Comment49 Tejas Bhatt, January 20, 2010 at 5:58 p.m.:

This lecture is very useful for understanding the basics of fuzzy logic.

Comment50 Kaoutar, February 24, 2010 at 1:23 p.m.:

First of all, nice lectures thanks for establishing this website and videolectures.
I am at the moment working on my MA thesis and I use the fuzzy-set/Qualitative Comparative Analysis (of Prof. Charles C. Ragin). In Ragin's book ‘Fuzzy-Set Social Science’ (2000) he discusses a number of types of fuzzy sets. I would like to know if somebody who also used this method would know whether it is possible to use different types of fuzzy-set to translate the conditions to fuzzy membership scores. For example to value condition A use a three value fuzzy-set and for condition B a seven value fuzzy-set.

Hope someone could give me an answer.

Kind regards

Comment51 Kaoutar, February 24, 2010 at 1:55 p.m.:

I have got my answer on my question :). I got a reply from a PhD student and he told me it's possible to use different coding for fuzzy-sets. As long as you "calibrate" your variables (i.e. transform your variables into fuzzy sets) in the good way, everything is possible. And fuzzy values can only correspond to ordered categories!

Comment52 José Tomás Guzmán, March 15, 2010 at 5:32 p.m.:

Thank you so much.

Comment53 Bishnu Rawal, March 29, 2010 at 10:40 a.m.:

ya, same problem guys, no option for offline view...

Comment54 Saleem Awan, April 7, 2010 at 2:05 p.m.:

This is really amazing lecture. Thanks for bringing nice things online

Comment55 mehti, April 26, 2010 at 9:47 a.m.:

It was really nice lecture.
Thank you very much, you mention all main points of fuzzy logic, i was waiting for.=))

Comment56 Kuidnov Oleh, May 26, 2010 at 11:53 p.m.:

Hi there!I found very helpful tutorial about fuzzy logic.It is the easiest way to learn and understand this logic.
Just enjoy it_:


Comment57 Usman, June 9, 2010 at 8:14 p.m.:

Sir, What a wonderfull lecture? Its very educative.However, i couldnt view it all cos of internet failure. It would be good to get it in downloadable form.

Once again, we are gratefull. Cheers

Comment58 mahtab, July 13, 2010 at 9:40 a.m.:

very good

Comment59 Dr Kharche A.W., August 9, 2010 at 8:35 a.m.:

I learnt alot about fuzzy logic from this lecture. Is it possible to down load the lecture and how?

Comment60 santa's helper, December 15, 2010 at 3:09 a.m.:

Try a free program called Streamtransport to download from jwplayer type flash videos over rtmp transport layer.

Comment61 Fuzzy Seeker, March 5, 2011 at 4:52 a.m.:

It would have been nice if the person who is doing the video focus on the slides that the lecturer is showing.

Coz we don't have any idea what he is pointing at, As the cameraman is showing only the lecturer most of the time.

Comment62 Aty, May 9, 2011 at 2:40 a.m.:

Thank u for the video But I think, it would be more useful if u show the slides.

Comment63 arman, December 2, 2011 at 11:25 a.m.:

thanks.but why you didn't write about dr.lotfizade (fuzzy logic's father at world)at above texts

Comment64 Kolly Adex, May 6, 2012 at 9:23 a.m.:

It is very educative. Can I have your email address please?

Comment65 foziacheema, September 11, 2012 at 3:24 a.m.:

these lectures are useful but i could not watch them properly due to weak signal of my net connection. can i have download them on my system

Comment66 zahoor maharvi, December 17, 2012 at 8:25 a.m.:

well,these lectures are very impressive and usefulfor fuzzy logic it will be more effective for me if can download them thanks

Comment67 Karl, January 25, 2013 at 11:01 p.m.:

Thank you so much for this lecture! It's great!!!
In part 2 you said there are exponentially many rules in high dimensional space. The rules increase exponentially with granularity and geometrically with dimensions.
I really appreciate how understandable your lecture is! Thanks!

Comment68 renu sharma, February 17, 2013 at 7:41 p.m.:

can I get some information about fuzzy logic in food technology?

Comment69 NIRMAL KUMAR PANDEY, December 11, 2013 at 4:03 p.m.:

i am realy thankful to you sir your lectures are of immense help to me, i am looking forward my pdh , could you provide me some details like the recent applications and area of research using fuzzy tools in control systems and is it possible to download these lectures if so how?

Write your own review or comment:

make sure you have javascript enabled or clear this field: