Guest Book

The fields marked with a * are required !

Sign the guest book
What is the result of 5 + ten?

Message

Brandon
Avatar
The 28/02/2018
This site is really incredible. They understand the tools relevant to modern advanced scientific analysis--but teach it at the level of someone trying to build these skills from scratch. Incredible attention to detail.

Message

Visitor
Avatar
The 18/02/2018
Thanks Mr Kassambara for the great work and energy to share knowledge!! Really love your work!! Keep on going!!

Message

Visitor
Avatar
The 13/02/2018
Thank you so much for sharing your experience and information about this topic in such a nice way.

Kind regards
Christopher

Message

Visitor
Avatar
The 23/12/2017
I like this PCA by the Kassambara but only one I hope is oriented around health e.g. PCA for heart failure readmission rate prediction. If something like this already there, please direct me.

Message

dennis
Avatar
The 07/11/2017
Good afternoon, your sample illuatration is great.
I just follow your step to test on my sample but got the following errors. My sample is also text file. Any idea? thank you.
> m <- as.matrix(dtm)
Error in vector(typeof(x$v), prod(nr, nc)) :
vector size specified is too large

Message

Visitor
Avatar
The 02/10/2017
Thank you for sharing

Message

Visitor
Avatar
The 14/09/2017
Hello from Chile:

This site is extremely valuable. It contains a lot of details abut procedures in R. It contains good explanations and it's very easy to understand. In fact, I have a question, is there a posibility that take all this site, and put it into a book, not just specific books that you have, but all material published here. It's very, very important. I will be the firt buyer, I'm sure!

Pablo Caceres

Message

Visitor
Avatar
The 21/08/2017
Very helpful guide for using the xlsx package.

R.H.

Message

The 14/04/2017
Just found your site and loved:

http://www.sthda.com/english/wiki/elegant-correlation-table-using-xtable-r-package

I've always wanted to crank out pretty half corr tables. Now I can. Thank you!!!!

... and then I noticed you have books! In grad school (1989) I used Lee Wilkinson (now VP stats at Tableau)'s SYSTAT/SYGRAPH and worked every example in the manual. That is where I learned cluster. I will buy your cluster book soon. But was wondering if it includes model based cluster analysis, the stuff Adrian Rafferty at UW is doing? http://www.stat.washington.edu/raftery/Research/mbc.html

The only reason I found Rafferty's stuff was that I had a client (Frontier Airlines) that wanted data-based clustering. So I started searching and was delighted to find model based clustering. I don't know if it is crap or gold, yet. But thought you might be someone to talk to about this!

Best Regards! Bill Meade