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Please drop me a note if you find this tutorial is useful. I also welcome any suggestions to improve it. Let me know what worked for you and what didn't by answering the feedback form below. Sorry, I cannot help you to solve your assignment or homework. Check the FAQ before you post your question.

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Visitors' Comments on Tutorial: LDA

We have 10 comments on this tutorial

rate up: 21 rate down: 9 last rated date: 2013-05-24

Is this comment useful? yes no

Thank you > Thanks (date: 2010-06-29)

I am doing some consulting using skills I have in high performance computing but in the area of statistics where I am quite weak. Your tutorial on LDA, for instance, is really helpful. Thanks much.

rate up: 147 rate down: 131 last rated date: 2013-05-16

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Thank you > LDA tutorial (date: 2010-07-19)

By Abhijit Shankar Bahirat

I am grateful to author for such an wonderful feast. The text is very easy to understand and importantly briefly reviewed. Handy stuff for a novice. Thanks again, Abhijit

rate up: 159 rate down: 121 last rated date: 2013-05-24

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Question > DIGITAL BIT STREAM (date: 2010-08-17)

Hello Sir! Thank a lot for ur work. Can you please guide me or provide me a link for \"How to recognise a digital bit stream as a DIGITAL VOICE(PCM/ADPCM/CELP/GSM..etc) or a mere DATA(binary)\". Autocorrelation I tried little.But Puzzled.Some of the Papers by N.Benevenuto specifies that it can be done with LDA.Can U help me in this regard,Sir? > Thank U.

rate up: 183 rate down: 130 last rated date: 2013-05-24

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Suggestion > statistical pattern recognition (date: 2010-08-22)

very good tutorial. NEED TUTORIAL ON PCA AND ICA

rate up: 138 rate down: 148 last rated date: 2013-05-24

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Answer > ICA and PCA (date: 2010-08-24)

I will put those suggestion into my wish list. Thanks for your suggestion. If you like the tutorial, please recommend it to your friends

rate up: 153 rate down: 115 last rated date: 2013-05-24

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Question > Discriminant analysis (date: 2010-09-17)

Dear Sir, I have large number of data that need to classified into two groups using discriminant analysis. I read your article about LDA and go through the your tutorial as well(http://people.revoledu.com/kardi/tutorial/LDA/Numerical%20Example.html). It was a great help me to understand the LDA. But in this example we classified data into two groups using only two features. 1. If we have more features(more than two) how we classified data into two groups ? (can you give me a simple example). 2. In my problem my data has several number of features(they represent by values) and each of data doesn\'t contain same number of features. The number of features can be changed. But I need to classify my data into two classes using discriminant analysis. Can I use LDA for that if can how can we use this. Please help me to overcome this problem if you have time. It is great if you can explain by a example because Im not a statistical guy Im only a computer since student. Thank you, Ruwan

rate up: 125 rate down: 120 last rated date: 2013-05-24

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Answer > Discriminant analysis (date: 2010-09-18)

Hi Ruwanlcs, Number of features does not matter. Similarly using the maximization of the discriminant function, you can solve for any number of groups, not necessarily 2. If you have missing values, you probably want to use similar value or average value of the same feature, otherwise, you should use other method such as EM algorithm

rate up: 148 rate down: 104 last rated date: 2013-05-16

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Others > Discriminant analysis(LDA) (date: 2010-09-27)

Dear Sir, I\'ve implemented a simple program for LDA and that will be classified our input objects into two grpus according to their features(two features) and training data(predefine group). But here still we have to hard coded our mean of features in each group and covariance matrix of group. >>>>>>>>> some outputs >>>>>>> Enter your object features(ex: 3.21,4.51) : 2.59,5.47 Object group is G2 (39.17382856206457,39.9518385396128) Enter your object features(ex: 21,4.51) : 2.84,5.67 Object group is G1 (46.19302206206457, 5.807523539612795) I\'d like to implement a program for object which has more than two features and which we want to classified into two groups. If you give me an example I\'ll try my best. Thank you,

rate up: 134 rate down: 98 last rated date: 2013-05-19

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Thank you > Thank you (date: 2011-03-27)

By Khoa Đặng

I\'m looking for an easy tutorial on LDA. Thanks for your post.

rate up: 93 rate down: 84 last rated date: 2013-05-24

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