AnalyticBridge - Social Network For Analytic Professionals

Social Network For Analytic Professionals

Business Analytics, Data Mining, Operations Research, Predictive Modeling, Econometrics, Quant, Statistics, Text Mining, Web Analytics.

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Time Series Forecasting

by Dominic Pouzin

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by Vincent Granville

Sales Analyis - Unified Data View and Link Analysis

by Tony Agresta

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Latest Activity

Vincent Granville added a video

1 hour ago

Vincent Granville added a discussion to the group Conferences

The Business of Data (Feb 1-3, Santa Clara, CA)

O'Reilly Strata ConferenceThe Business of Data Call for participation is open Strata is a new conference from O'Reilly, focusing on the business and practice of data. Unprecedented computing power and connectivity are bringing new layers of experien…

1 hour ago

Vincent Granville added a blog post

Data Week: Becoming a data scientist (from Oreilly)

Data Pointed, CouchDB in the Cloud, Launching Strata by Edd Dumbill | http://cdn.apture.com/media/imgs/link_icons.gif?v12) !important; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: transparen…

1 hour ago

David G. Young replied to David G. Young's discussion 'The Most Important and Least Thought about Variable: The Dependent' in the group Analytical Techniques

REPOSTED WITH PERMISSION OF THE CONTRIBUTOR Group: Global Analytics Network (+5K analytic professionals) Discussion: The Most Important and Least Thought about Variable: The Dependent Using a dependent variable which is correlated with the variable…

5 hours ago

Tom Wolfer replied to Bhaswati Sengupta's discussion 'Cluster analysis with categorical variables ?'

Ah, so, in other words, save for the two assumptions that you mentioned above, LCA is essentially a form of Factor analysis. Except, Factor Analysis would be a data reduction technique used on a bunch of same-scale (eg. 1-10) attitudinal variables;…

5 hours ago

Ralph Winters replied to Bhaswati Sengupta's discussion 'Cluster analysis with categorical variables ?'

Tom. The two main benefits are ability to mix different scaled variables within the model framework, and no distribution assumptions. LCA does not assign to only 1 group, it computes the posterior probabilities of an observation belonging to all of…

6 hours ago

Vincent Granville replied to Vincent Granville's discussion 'AnalyticBridge competition: investigate the spectacular stock market collapse of May 6, 2010' in the group Data Mining Competitions

On Wednesday September 8, 2010, 1:09 pm WASHINGTON/NEW YORK (Reuters) - Regulators probing the stock market "flash crash" last May still have not uncovered a single cause but will point to "stub quotes" and other previously identified issues as hav…

7 hours ago

Ralph Winters replied to Bhaswati Sengupta's discussion 'Cluster analysis with categorical variables ?'

Main reason is that nominal categorical variables do not have order. for others, you are assigning them arbitrarily. The dummy variable technique is fine for regression where the effects are additive, but am not sure how I would interpret them in a…

7 hours ago