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Archive for April, 2012

How to remember point shape codes in R

April 24th, 2012 13 comments

I suspect I am not unique in not being able to remember how to control the point shapes in R. Part of this is a documentation problem: no package ever seems to write the shapes down. All packages just use the “usual set” that derives from S-Plus and was carried through base-graphics, to grid, lattice and ggplot2. The quickest way out of this is to know how to generate an example plot of the shapes quickly. We show how to do this in ggplot2. This is trivial- but you get tired of not having it immediately available. Read more…

Categories: Tutorials Tags: , , ,

Congratulations to both Dr. Nina Zumel and EMC- great job

April 21st, 2012 1 comment

A big congratulations to Win-Vector LLC‘s Dr. Nina Zumel for authoring and teaching portions of EMC‘s new Data Science and Big Data Analytics training and certification program. A big congratulations to EMC, EMC Education Services and Greenplum for creating a great training course. Finally a huge thank you to EMC, EMC Education Services and Greenplum for inviting Win-Vector LLC to contribute to this great project.

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Setting expectations in data science projects

April 21st, 2012 1 comment

How is it even possible to set expectations and launch data science projects?

Data science projects vary from “executive dashboards” through “automate what my analysts are already doing well” to “here is some data, we would like some magic.” That is you may be called to produce visualizations, analytics, data mining, statistics, machine learning, method research or method invention. Given the wide range of wants, diverse data sources, required levels of innovation and methods it often feels like you can not even set goals for data science projects.

Many of these projects either fail or become open ended (become unmanageable).

As an alternative we describe some of our methods for setting quantifiable goals and front-loading risk in data science projects. Read more…