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. Author manuscript; available in PMC: 2018 Jan 1.
Published in final edited form as: J Xray Sci Technol. 2017;25(5):751–763. doi: 10.3233/XST-16226

Figure 3.

Figure 3

The training curve of fold 1 – 4 (a) – (d). It shows that the testing errors yields 35%, 23.57%, 25%, and 20.71% at epoch 40 for the training fold 1, 2, 3, and 4, respectively. The vertical line indicates the epoch corresponding to the optimal training error.