Managing big data, Part 1: Technical questions
With Big Data, there are far more technical questions than answers.
English
Create a correlation matrix from the upper triangular elements
A recent question posted on a discussion forum discussed storing the strictly upper-triangular portion of a correlation matrix. Suppose that you have a correlation matrix like the following: proc iml; corr = {1.0 0.6 0.5 0.4, 0.6 1.0 0.3 0.2, 0.5 0.3 1.0 0.1, 0.4 0.2 0.1 1.0}; Every correlation
Pink and Blue - The Colors of Breast Cancer
Pink and blue. These colors are often synonymous with gender. In fact, when I was pregnant 16 years ago, we had no idea of our baby’s sex. At the shower, we received lots of blue, green and yellow clothing, but no pink. It’s interesting how blue can represent both male