DYI SVM demo. Try to get the SVM cost function as low as possible while respecting the constraints! Constraint violation displayed in red.
click: add X-point, shift+click: add O-point, ctrl+click: remove last point. (recommended way of interaction: click into an input field, use mouse scroll-wheel to change the value. If that doesn't work, try keyboard arrow up/down.)
$C$:

The SVM task - minimize:
$\frac{1}{2} \| \mathbf{w} \|^2 + C \sum_{i=1}^{m}{\xi_i} =$
subject to:

$w_1$: $w$ angle:
$w_2$: $w$ length:
$b$: