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#1
In the mentioned section, the prediction for the three inputs example (in the figure) is as below:

pred = (8.5 * 0.1) + (0.65 * 0.2) + (1.2 * -0.1) = 0.85 + 0.13 -0.12 = 0.86

true = 1

delta = pred - true = 0.86 - 1 = -0.14

So, the delta value must be -0.14 and not 0.14.

Also, wlrec[0] is different in the code and the figure.