.. _book_fig_chapter8_fig_cross_val_C:


Cross Validation Examples
-------------------------
Figure 8.14

The top panel shows the root-mean-square (rms) training error and validation
error for our toy model (eq. 8.75) as a function of the polynomial degree d.
The horizontal dotted line indicates the level of intrinsic scatter in the
data. Models with polyno- mial degree from 3 to 5 minimize the validation rms
error. The bottom panel shows the Bayesian information criterion (BIC) for the
training and cross-validation subsamples. According to the BIC, a degree-3
polynomial gives the best fit to this data set.



.. image:: ../images/chapter8/fig_cross_val_C_1.png
    :scale: 100
    :align: center


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