Principal Component Analysis 1 Introduction (1/2) Improved sound
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- Опубликовано: 18 сен 2024
- Quality and Technology group (www.models.life.ku.dk)
LESSONS of CHEMOMETRICS:
Principal Component Analysis (PCA)
1. An introduction to Principal Component Analysis
PART 1/2
This first of four parts explains why PCA is useful in Chemometrics and exploratory analysis in general.
It explains how PCA works and why working multivariately can give more information than when only looking at one variable at a time.
Wow....This has been one of the best tutorials on a subject I have ever seen. The amount of time spent creating that 3D max video was well worth it as it really exactly conveys the meaning of PCA.
Farhad Alizadeh Noori. Thanks so much Farhad. That is more than nice to hear. Glad you liked it.
The best tutorial on PCA that there is on the internet. THANK YOU
great tutorial--clearest explanation I've found yet on PCA.
Really great introduction! I'm using PCA on enormous data sets of mass spectrum peaks as a function of depth profiled in complex layered samples and I always find it difficult to convey the essence of PCA using my data as an example for non-specialist audiences. Your tutorial gives me some ideas on how to do a better job of that.
Thanks so much for all these nice comments. We really, really appreciate that. Thanks
Wow, this is such a great explanation. So clear and easy to understand, even for someone like me with a VERY limited background in math. Fingers crossed that your videos on partial least squares are as good as these! :)
+Andrew Lauzon . Thanks so much for your kind words. That is highly appreciated. And spoiler alert: PLS is much harder to explain nicely .. at least for me.
it sure is one of the best PCA videos I've seen , Tnx!
Very nice video. Highly informative.
Hi Thomas. Thanks so much for your kind words. I am really happy that I could be of help. And I would very much like to see your work whenever it is ready.
Very didactic explanation,best than the university.
Amazing explanation, great job
Great video. Thanks!!!
Excellent introduction.
Hi Professor Bro, thanks for your explanation. I'm applying the PCA concept in a new area of investigation. My thesis' results deserve considerations and i'd like to say thanks 'cause i start to study this theory using your Book, Monograh and videos. I hope that one day i can show my results/publications to you to know your opinion about the application.
wow, so outstanding explanation. Thanks a lot for this amazing tutorial.
+Wilmer Omar Zuñiga Reye Thanks Wilmer. It is really nice to hear that the tutorials are helpful.
Thank you. This video is amazing!
Very clean lecture. Thank you.
Great explanation!
Very well done, even I could understand.
I love this tutorial. Thanks to the tutor
Wow, which program did you use for this diagram with Smith, Williams, Johnson etc.? I love it.
Also, thanks for the good introduction!
trishdish2011 Thanks so much. The program is called 3D max. Highly recommended!
Thanks much for that. That is highly appreciated.
thank you so much
thank you very much Sir. It is so helpful
Thanks
THX!!
I understood. Thanx
I have a table which contains about 80 variables.
I will give one variable as input and as output I want to have all the variables that are related to the input variable.
example : I have hospital data which contains patient name , blood pressure , sugar, heart rate , ecg , heart patient ....
if I give heart patient as input ,then as output I have to give ecg , heart rate , blood pressure , ecg .
So I need to find the variables which are related to the heart patient. and the rest will be ignored.
Isn't it possible with PCA.
What software are you using in performing PCA?
I use PLS_Toolbox but there are many equally nice software packages
@@RasmusBroJ can i ask another question? Is there any requirement on performing pca? Like if the difference between two or three consecutive sample of one variable is zero? Can i use that variable in performing pca?
@@ricmartgarbin4308 Maybe check here:: pubs.rsc.org/en/content/articlehtml/2014/ay/c3ay41907j
what european country is similar to japan ? I have to deal with this type of questions in my project. Can you please give me some references to solve it , or some keywords will be help full.
Hi Munjal. You should google things like clustering, MSPC, adulteration and similar things. Kind regards