Fig. 4

Comparison of a scatterplot (left) and a Bland–Altman plot (right, also MA plot for omics data) of the same data. In this example, the predicted values of two regression models (including and excluding a variable called FLGROSS) are compared. The scatterplot shows similar values for most observations, with points close to the diagonal. The Bland–Altman plot, with differences on the y-axis (on log-scale for MA plots on omics data typically log-ratios), better visualizes the dependence on the average value of the predictions (typically average log intensity for MA plots). The smoothing line in the example Bland–Altman plot indicates the shape of dependence of the differences on the average values. Source: [35]