y = np.r_[ -2*X[0:100]+2, 1*X[100:200]-3+2, 3*X[200:300]-7+2 ] arts.extend( plt_yhat(ax[0], X, w00, b00, w01, b01, w02, b02) ) _ = plt_unit(ax[1], X, w00, b00) #Fixed ...