Each numbered folder starts from a new initial configuration of particles, and contains sub-directories named "forward" (shear) and/or "reverse" (unshear). Missing numbered runs and missing shear/unshear sub-directories are datasets that were discarded prior to analysis for the paper. Each forward/reverse directory contains: * the raw images (red particle = unpolarized light, green forces = polarized light) used to perform PEGS data analysis. Image names are listed as DSC + sample number + .JPG where the sample number increments by 2 for each shear step * adjacency matrices resulting from the image analysis and force-reconstruction. There are four files associated with each image, all starting with the prefix DSC + sample number + _solved_Tracke_ + ParticleData.dlm BinaryAdjacencyMatrix.dlm NormWeightedAdjacencyMatrix.dlm TanWeightedAdjacencyMatrix.dlm The details of each of these four files are given below. /**************************************************************/ ParticleData.dlm: N rows x 5 columns of data describing the position and size of each particle Column 1: particle numbering from 1 to N total particles Column 2: x coordinates of particles (pixels) Column 3: y coordinates of particles (pixels) Column 4: radii of particles (pixels) Column 5: quality of the force reconstruction, in arbitrary units /**************************************************************/ BinaryAdjacencyMatrix.dlm: N x N matrix describing which particles are in contact Element M_ij=1: contact between particle i and j detected from particle i Element M_ij=0: contact between particle i and j not detected from particle i Matrix is not necessarily symmetric /**************************************************************/ NormWeightedAdjacencyMatrix.dlm: N x N matrix describing the normal force at each contact Non-zero element M_ij: normal force between particle i and j, detected from particle i Zero element M_ij: no contact between particle i and j, detected from particle i Matrix is not necessarily symmetric /**************************************************************/ TanWeightedAdjacencyMatrix.dlm: N x N matrix describing the tangential force at each contact Non-zero element M_ij: tangential force between particle i and j, detected from particle i Zero element M_ij: no contact between particle i and j, detected from particle i Positive values represent counterclockwise forces Negative values represent clockwise forces Matrix is not necessarily symmetric