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Figure 2 | Breast Cancer Research

Figure 2

From: Optimal tumor sampling for immunostaining of biomarkers in breast carcinoma

Figure 2

Cross validation design. (1) Division of cohort into test set and training set. Repeated 10 times. (2) Division of training set into learning set and evaluation set. Repeated 1,000 times. (3) Fitting of linear regression over learning set. Performed for sample sizes of one to thirty five field of views (FOVs). Calculation of average prediction error over evaluation set. Red arrow indicates first local minimum. (4) Calculation of average prediction error over the test set. Gray arrow indicates over local minimum over 10 training sets. Black arrow indicates smallest value within one standard error of average first local minimum.

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