The-Dream, the R&B singer and behind-the-scenes power player, recently boasted of a $15 million payday for writing Rihanna's 2007 smash Umbrella. True? When you have a cross-over song, it just makes more and more and more money, says Tom DeSavia, a vice president at Notable Music, a 50-year-old music publisher founded by the late songwriter Cy Coleman.
Simple guide to confusion matrix terminology. A confusion matrix is a table that is often used to describe the performance of a classification model (or classifier) on a set of test data for which the true values are known.The confusion matrix itself is relatively simple to understand, but the related terminology can be confusing. wanted to create a quick reference guide for confusion matrix terminology because I couldn't find an existing resource that suited my requirements: compact in presentation, using numbers instead of arbitrary variables, and explained both in terms of formulas and sentences.
Since for any matrix A, (kA)â² = kAâ², it follows that 1/2 (A + Aâ²) is symmetric matrix and 1/2 (A â Aâ²) is skew symmetric matrix. Thus, any square matrix can be expressed as the sum of a symmetric and a skew symmetric matrix. Example Express the matrix as the sum of a symmetric and a skew symmetric matrix. Solution Here Let Thus P = 1/2 (B + Bâ²)is a symmetric matrix. Also, let Then Thus Q = 1/2 (B â Bâ²)is a skew symmetric matrix.