Standardization vs. normalization

In the overall knowledge discovery process, before data mining itself, data preprocessing plays a crucial role. One of the first steps concerns the normalization of the data. This step is very important when dealing with parameters of different units and scales. For example, some data mining techniques use the Euclidean distance. Therefore, all parameters should have the same scale for a fair comparison between them.

Two methods are usually well known for rescaling data. Normalization, which scales all numeric variables in the range [0,1]. One possible formula is given below:

On the other hand, you can use standardization on your data set. It will then transform it to have zero mean and unit variance, for example using the equation below:

Both of these techniques have their drawbacks. If you have outliers in your data set, normalizing your data will certainly scale the “normal” data to a very small interval. And generally, most of data sets have outliers. When using standardization, your new data aren’t bounded (unlike normalization).

So my question is what do you usually use when mining your data and why?

Note: Thanks to Benny Raphael for fruitful discussions on this topic. Thanks to Jim for a correction on May 26th 2014.

Share

Comments

1,357 Comments on Standardization vs. normalization

  1. Bobby Raymand on Mon, 24th Apr 2017 7:27 am
  2. First time ever illuminati will be placing its officials online to help fish the destined ELITES
    it will interest you all to know that i the prince of illuminati the number three high ranking Elite in the illuminati organization
    will also be following the instructions of our lord LUCIFER to help welcome home every new member who wish to be a member
    contact moneytempleilluminati@gmail.com also available on whatsapp +2348105813057 EL LEL KANNON MASON”

  3. Sherican on Mon, 24th Apr 2017 9:01 am
  4. Happiness is all i see now I never thought that I will be cured from HERPES virus again. I have been suffering from a deadly disease (HERPES) for the past 3 years now, I had spent a lot of money going from one places to another, from churches to churches, hospitals have been my home every day residence. Constant checks up have been my hobby not until this faithful day, I was searching through the internet, I saw a testimony on how DR Uze helped someone in curing his HERPES disease, quickly I copied his email which is druzespelllhome@gmail.com just to give him a test I spoke to him, he asked me to do some certain things which I did, he told me that he is going to provide the herbal cure to me, which he did, then he asked me to go for medical checkup after some days after using the herbal cure, behold I was free from the deadly disease, he only asked me to post the testimony through the whole world, faithfully am doing it now, please brothers and sisters, he is great, I owe him in return. if you are having a similar problem just email him on ( druzespelllhome@gmail.com) or you can whatsApp his mobile number on +2347066577237..

  5. Sherican on Mon, 24th Apr 2017 9:02 am
  6. Happiness is all i see now I never thought that I will be cured from HERPES virus again. I have been suffering from a deadly disease (HERPES) for the past 3 years now, I had spent a lot of money going from one places to another, from churches to churches, hospitals have been my home every day residence. Constant checks up have been my hobby not until this faithful day, I was searching through the internet, I saw a testimony on how DR Uze helped someone in curing his HERPES disease, quickly I copied his email which is druzespelllhome@gmail.com just to give him a test I spoke to him, he asked me to do some certain things which I did, he told me that he is going to provide the herbal cure to me, which he did, then he asked me to go for medical checkup after some days after using the herbal cure, behold I was free from the deadly disease, he only asked me to post the testimony through the whole world, faithfully am doing it now, please brothers and sisters, he is great, I owe him in return. if you are having a similar problem just email him on ( druzespelllhome@gmail.com) or you can whatsApp his mobile number on +2347066577237...

  7. Wilson Norman on Mon, 24th Apr 2017 10:55 am
  8. Hello everyone am Wilson Norman from CANADA , i am here to give my testimony about a spell caster called OJABU, I was heartbroken because i had very small penis, not nice enough to satisfy a woman, i have been in so many relationship, but cut off because of my situation, i have used so many product which doctors prescribe for me, but none could offer me the help i searched for. i saw some few comments on the internet about this specialist called Dr, OJABU and decided to email him on his email i saw on the internet,( drojabusolutiontemple@gmail.com ) so I decided to give his herbal product a try. i emailed him and he got back to me, he gave me some comforting words with his herbal pills for Penis Enlargement, Within 3 week of it, i began to feel the enlargement of my penis, ” and now it just 4 weeks of using his products my penis is about 9 inches longer, and i had to settle out with my Ex girlfriend Jane, i was surprised when she said that she is satisfied with my sex and i have got a large penis. Am so happy, thanks to Dr OJABU, I also learn that Dr OJABU also help with Breast Enlargement Hips and Bums Enlargement etc.. If you are in any situation with a little Penis, weak ejaculation, small breast_hips_bums,if you need his help you can contact him on his via Email: drojabusolutiontemple@gmail.com or you can call or WhatsApp him on +2348074876448

  9. Angela on Mon, 24th Apr 2017 1:58 pm
  10. Hello everyone i live in usa here in this forum i am so glad that i have this great opportunity to come out here and share my testimony on how Doctor ALUEBOR was able to cure me totally from HIV disease, i have been suffering from this Disease for approximately 4 Years now, i have tried various ways to get rid of this Virus out of my body, i have also purchase for Medical treatment from my doctor but they all failed, sometime back now while i was browsing the Internet i found some good quote concerning Doctor ALUEBOR Herbal Medicine, and how he has been using it to save souls from Different Disease including Cancer, someone also said she was been cured of HIV from his medicine, and they gave out his contact details in case anyone needs his help, AND HE ALSO DEALS ALL KINDS OF SPELL i decided to contact Doctor ALUEBOR and i told him about my HIV illness he told me not to worry that he was going to send me his herbal medicine all i was to do is to send him my personal details and also my home address so he can post the Medicine to me, actually i did all that was required by this Man, i took the medicine just as prescribe by him, he told me to go for check up in the hospital which i did and to my great surprise my Doctor told me the (HIV and AIDS Virus) was no longer there, i even went to other hospital for better confirmation its was still the same thing, Today i am so happy that i am Negative again, Doctor ALUEBOR has given me reasons to share tears of Joy, you can reach to Doctor ALUEBOR on his email address at Alueborhomeofsolution@gmail.com OR WHATSAPP HIM ON THIS NUMBER 2349034433639

  11. gavin kate on Mon, 24th Apr 2017 8:29 pm
  12. My name is gavin kate i am from boston usa, you can also add me on
    Facebook or send me an email via gavin000kate@gmail.com
    I am here to give my testimony about
    Dr LUCKY Natural Herbal Medicine who helped me in my
    life, i want to inform the public how i was cured from (HERPES SIMPLEX
    VIRUS) by Dr LUCKY, i visited different hospital but they gave me
    list of drugs like Famvir, Zovirax, and Valtrex which is very expensive
    to treat the symptoms and never cured me. I was browsing through the
    Internet searching for remedy on HERPES and i saw comment of people
    talking about how Dr LUCKY cured them. when i contacted him he gave
    me hope and send a Herbal medicine to me that i took and it seriously
    worked for me, in less than five days i was free, my HERPES result came out negative. I am so happy sharing this testimony. My advice to you all who thinks that there is no cure for Herpes, he is also specialized in the cure of the following: Cancer, HIV, Low sperm count, Barrenness, Hvp, Genital Wart, Rare disease, Hepatitis, Syphilis, Diabetes. etc. just contact him and get cure.
    Dr LUCKY
    EMAIL: Drluckyherbalmedicinehome@gmail.com or doctorkinglucky@gmail.com

  13. Aliakbar Panahi on Tue, 25th Apr 2017 6:56 pm
  14. Thanks for the post about normalization and standardization.
    I don’t know why people do ads on scientific websites!

Tell me what you're thinking...





  • Swiss Association for Analytics

  • Most Popular Posts

  • T-shirts, Mugs & Mousepads


    All benefits given to a charity association
  • Data Mining Search Engine

    Supported by AnalyticBridge

  • Archives

  • Reading Recommandations