As an unabashed lover of data, I am thrilled to be living and working in our increasingly data-constructed world. One new type of data analysis eliciting strong emotional reactions these days is the sentiment analysis of the directly digitized feedback from customers provided via their online reviews, emails, voicemails, text messages and social networking
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The dark side of the mood
The inverse of the Hilbert matrix
Just one last short article about properties of the Hilbert matrix. I've already blogged about how to construct a Hilbert matrix in the SAS/IML language and how to compute a formula for the determinant. One reason that the Hilbert matrix is a famous (some would say infamous!) example in numerical
How are your tax dollars spent? Let's graph it!
As I was doing my taxes, I wondered where the government is spending my tax dollars. And being a SAS user, I decided to find out using a graph ... I did a few Google searches on "tax graphs" and found one on the CNN web site that I liked - it