Fig. 1
From: Personalised profiling to identify clinically relevant changes in tremor due to multiple sclerosis
Conceptual illustration of the scale and profile changes in tremor between two measurements (A and B), applied to a hypothetical example using only two joint rotations as the basis parameters. The characteristic vector is defined by point C, whose coordinates are typical values of tremor in joints 1 and 2 for this limb (based on other measurements, not shown). Note that the change in scale is measured parallel to the characteristic vector, and the change in profile is measured perpendicular to it