sparse

PURPOSE

SYNOPSIS

DESCRIPTION

SPARSE Create sparse matrix (EIDORS overload).
   S = SPARSE(X) converts a sparse or full matrix to sparse form by
   squeezing out any zero elements.

  See also SPARFUN/SPARSE

 Sparse doesn't work for uint* inputs, so we need to preconvert to double

CROSS-REFERENCE INFORMATION

• left_divide [V] = LEFT_DIVIDE(E,I,tol,pp,V);
• bld_master function [Ef,D,Ela] = bld_master(vtx,simp,mat_ref);
• bld_master_full function [Ef,D,Ela] = bld_master_full(vtx,simp,mat,elec,zc);
• exponential_covar_prior EXPONENTIAL_COVAR_PRIOR image prior with exponential
• integrofgrad function [IntGrad] = integrofgrad(vtx,simp,mat_ref);
• mapper_nodes_elems MAPPER_ELEMS_NODES: calculates mapping function taking elems to nodes
• cheating_2d code to simulate inverse crimes in EIT
• demo_real [inhomg_img, demo_img] = demo_real;
• calc_grid_points CALC_GRID_POINTS - image values at points in grid
• mdl_slice_mesher MDL_SLICE_MESHER A slice of a 3D FEM as a 2D FEM
• show_fem_enhanced SHOW_FEM_ENHANCED: show the EIDORS3D finite element model
• eidors_readdata EIDORS readdata - read data files from various EIT equipment
• sigmatome2_filter SIGMATOME2_FILTER: Hardware filter and stim_patterns for Sigmatome II device
• calc_mesh_quality CALC_MESH_QUALITY Various measures of mesh quality.
• distmesh2d DISTMESH2D 2-D Mesh Generator using Distance Functions.
• distmeshnd DISTMESHND N-D Mesh Generator using Distance Functions.
• mat_idx_to_electrode MAT_IDX_TO_ELECTRODE: create electrodes from mat_idx values
• analytic_2d_circle V = analytic_2d_circle(J, [s_h, s_i, b, a, angl])
• calc_model_reduction calc_model_reduction: calculate the fields for a reduced model
• deform_cylinder fwd_mdl = deform_cylinder( fwd_mdl, niv);
• find_edge2edge_intersections FIND_EDGE2EDGE_INTERSECTIONS intersections between edges of two models
• fix_model FIX_MODEL: Add useful fields to a model
• get_elem_volume GET_ELEM_VOLUME: VOL = get_elem_volume(fwd_model, map_node )
• mk_approx_c2f MK_APPROX_C2F: create a mapping matrix from coarse to fine FEM
• mk_c2f_circ_mapping MK_C2F_CIRC_MAPPING: create a mapping matrix from circles/spheres to FEM
• mk_common_model MK_COMMON_MODEL: make common EIT models
• mk_grid_c2f MK_GRID_C2F - calculate a coarse2fine mapping for grid coarse models.
• mk_grid_model MK_GRID_MODEL: Create reconstruction model on pixelated grid
• mk_stim_patterns MK_STIM_PATTERNS: create an EIDORS stimulation pattern structure
• mk_tet_c2f MK_TET_C2F - calculate a coarse2fine mapping for two tet-based models.
• mk_tri2tet_c2f MK_TRI2TET_C2F - coarse2fine mapping between tri-based and tet-based models
• mk_tri_c2f MK_TRI_C2F - calculate a coarse2fine mapping for triangle-based models.
• place_elec_on_surf PLACE_ELEC_ON_SURF Place electrodes on the surface of a model
• point_in_tet POINT_IN_TET test for points contained in elements
• point_in_triangle POINT_IN_TRIANGLE tests points for membership in triangles
• simulate_2d_movement SIMULATE_2D_MOVEMENT simulate rotational movement in 2D
• stim_meas_list STIM_MEAS_LIST: mk stimulation pattern from list of electrodes
• calc_R_prior R = calc_R_prior( inv_model, varargin )
• calc_meas_icov meas_icov = calc_meas_icov( inv_model )
• calc_transferimpedance CALC_TRANSFERIMPEDANCE: Calculates transfer impedance matrix
• fwd_model_parameters FWD_MODEL_PARAMETERS: data= fwd_solve_1st_order( fwd_model, image)
• fwd_solve_1st_order FWD_SOLVE_1ST_ORDER: data= fwd_solve_1st_order( img)
• jacobian_adjoint_higher_order Find the Jacobian associated with an image (and forward model)
• jacobian_movement JACOBIAN_MOVEMENT Computes the Jacobian matrix for conductivity and
• jacobian_movement_2p5d_1st_order JACOBIAN_MOVEMENT_2P5D: J = jacobian_movement_2p5d_1st_order( img )
• spice_eit Vn = spice_eit(netlist, [freq])
• system_mat_1st_order SYSTEM_MAT_1ST_ORDER: SS= system_mat_1st_order( fwd_model, img)
• system_mat_2p5d_fields SYSTEM_MAT_2P5D_FIELDS: fields (elem to nodes) fraction of system mat
• system_mat_fields SYSTEM_MAT_FIELDS: fields (elem to nodes) fraction of system mat
• system_mat_higher_order Assemble the total stiffness matrix : s_mat.E=At;
• system_mat_instrument SYSTEM_MAT_INSTRUMENT:
• update_system_mat_fields UPDATE_SYSTEM_MAT_FIELDS: fields (elem to nodes) fraction of system mat
• GREIT_desired_img_sigmoid GREIT_DESIRED_IMG_SIGMOID sigmoid-decay desired image function for GREIT
• inv_solve_abs_pdipm INV_SOLVE_ABS_PDIPM inverse solver for absolute data using Primal/Dual interior point method
• inv_solve_core INV_SOLVE_CORE Solver using a generic iterative algorithm
• inv_solve_diff_pdipm INV_SOLVE_DIFF_PDIPM inverse solver for difference data using Primal/Dual interior point method
• nodal_solve NODAL_SOLVE inverse solver using approach of Adler&Guardo 1996
• prior_exponential_covar PRIOR_EXPONENTIAL_COVAR image prior with exponential
• prior_gaussian_HPF PRIOR_GAUSSIAN_HPF calculate image prior
• prior_laplace PRIOR_LAPLACE calculate image prior
• prior_laplace_old PRIOR_LAPLACE calculate image prior
• prior_movement PRIOR_MOVEMENT calculate image prior
• demo_real_test2 Perform tests based on the demo_real function with new structs
• demo_real_test3 Perform tests based on the demo_real function with new structs
• test_performance TEST_PERFORMANCE: test of difference reconstruction algorithms
• test_performance_img TEST_PERFORMANCE: test of difference reconstruction algorithms

SOURCE CODE

0001 function S = sparse(varargin)
0002 %SPARSE Create sparse matrix (EIDORS overload).
0003 %   S = SPARSE(X) converts a sparse or full matrix to sparse form by
0004 %   squeezing out any zero elements.
0005 %
0006 %  See also SPARFUN/SPARSE
0007 %
0008 % Sparse doesn't work for uint* inputs, so we need to preconvert to double
0009 
0010 % (C) 2011 Bartlomiej Grychtol. License: GPL v2 or v3.
0011 % $Id: sparse.m 6413 2022-11-26 20:29:19Z bgrychtol $
0012 
0013 for i= 1:nargin
0014   if ~isa(varargin{i},'double')
0015      varargin{i} = double(varargin{i});
0016   end
0017 end
0018 S = builtin('sparse',varargin{:});