title: What is b / ||w|| in support vector machine?
body: <p>In the picture of <a href="https://i.stack.imgur.com/Tm8ZY.png" rel="nofollow noreferrer">SVM</a> from Wikipedia, at the lower left corner - pointed by the red arrow, there's b / ||w||. How is that calculated? In other words, why is the line in the picture b / ||w||? Thanks.</p>