Fig. 12

Visualization of capacitance data with a sensing unit made of a PAH/PVS LbL film deposited onto an interdigitated gold electrode, using the Parallel Coordinates technique. The x-axis is the frequency and the y-axis gives normalized values for the capacitance. Note that for some small concentrations of phytic acid (denoted by different colors), there is overlap of the graphs. The little boxes on the top of the figure represent the silhouette coefficient for each data attribute. Blue boxes indicate frequencies that are useful for distinguishing the samples whereas the opposite applies for the red boxes. Reproduced with permission from Ref. [29]