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Alex Zolot
  • San Diego, CA
  • United States
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Latest Activity

Alex Zolot replied to Vincent Granville's discussion Challenge of the Week
"Without integration obviously Mean(cos(x)) = 0"
May 2, 2014
Alex Zolot commented on Theophano Mitsa's blog post Cross-validation in R: a do-it-yourself and a black box approach
"Instead of  >summ1<-numeric(1) >summ1=0 > for(i in 1:30){summ1<-summ1+diff1[i]^2} > summ1 more R-stile and more effective is   summ1= sum(diff1^2) Instead…"
May 26, 2013
Alex Zolot replied to Ravirajan.K's discussion How to reduce variables?
"in R something like that:   library(randomForest)       rft= tuneRF(Xvars, Yvar, stepFactor=1.2, doBest=T) rfi<- rft$importance;    barplot(rfi[order(- rfi)])  "
May 26, 2011
Alex Zolot replied to Vincent Granville's discussion Why Tables Are Really Much Better Than Graphs (by Andrew Gelman) in the group Statistical Graphics, Data Visualization
"You missed the most important part of the cited article - date of publication."
Mar 23, 2011
Alex Zolot replied to Steffen Springer's discussion Is R's apply-family only syntactic sugar in the group R-Project and Other Free Software Tools
"> N=1:1000000; st= system.time > xx=data.frame(i=N, x=N)/100 > st({A=sum(xx$x); B=sum(xx$i); print(c(A,B))}) [1] 5000005000 5000005000 [1] 0.02 > st({A=B=0 + for(i in N){A=A+xx[i,1]; B=B+xx[i,2]} + print(c(A,B)) + }) [1] 5000005000…"
Feb 14, 2010
Alex Zolot replied to Urko's discussion Odds ratios graphs in the group R-Project and Other Free Software Tools
"example of your code, plz"
Dec 21, 2009
Alex Zolot replied to Vincent Granville's discussion Google 3.0 - The next great innovation in search technology in the group Web Analytics
Nov 23, 2009
Alex Zolot replied to Vincent Granville's discussion Watching the Growth of Walmart Across America in the group Statistical Graphics, Data Visualization
Oct 7, 2009

Profile Information

Short Bio:
I am a Senior Statistician/ Sr. SW Engineer at Sun Microsystems. Formerly I was an Analytic Science Manager and a Lead Scientist at Fair Isaac Corp, managed and executed data mining projects for Kraft Foods, Visa, Discover Financial, Cox Communications,....

My fields of expertise include statistical analysis and modeling, and data mining, mainly predictive analytics. I have a Ph.D in Theoretical and Mathematical Physics, and a Ph.D. in Economics.
My Website or LinkedIn Profile (URL):
Field of Expertise:
Data Mining, Finance, Marketing Databases, SAS, Web Analytics, Industrial Statistics, Statistical Consulting
Years of Experience in Analytical Role:
Professional Status:
Technical, Manager, Consultant
Finding a New Position, Networking
What is your Favorite Data Mining or Analytical Website?
What Other Analytical Website do you Recommend?
Your Company:
Sun Microsystems Inc

Alex Zolot's Blog

GoogMeter compares anything

Posted on June 5, 2008 at 7:00am 0 Comments

A lot of companies spend a lot of time and money to get data related to customer preferences and behavior. At the same time huge amount of data can be extracted directly from Internet.

Usually to get knowledge about some objects from Internet we use two stage process:

  1. Google to get links;
  2. Follow by the links to specific web sites and get information there.

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