Figure 2: Construction of trajectories.
From: Analysis of free text in electronic health records for identification of cancer patient trajectories

(A) Progression of health state to multiple morbidities X and Y. (B) Variations in how patient information is registered yields a distorted information space observed by clinicians. (C) Frequent Item Set (FIS) mining identified observations that repeatedly appear together. (D) Trajectories are created using order of first appearance.