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. 2018 Jan 15;8:769. doi: 10.1038/s41598-017-19067-2

Figure 12.

Figure 12

Correlation differences between the phases before and after the change point for the depression data. The difference matrices for the compared methods were obtained by subtracting the before-change-point correlation matrix from the after-change-point correlation matrix. Since the correlations before the change point are either positive or close to zero, the large positive differences imply that most of the correlations after the change point strengthened dramatically.