Fig. 9
From: Tactile, Audio, and Visual Dataset During Bare Finger Interaction with Textured Surfaces
Principal Component Analysis of the normalized rankings of the textures. (a) Scatter plot of the textures in the reduced two-dimensional space defined by the first two principal components. To provide insight into the variability of the subjective evaluations within each texture, the mean and standard deviation of the samples in each texture group are visualized as a star marker and a circle, respectively (b) Percentage of variance explained by the first seven principal components. (c) Weights and modality of each question in the first four principal components.
