The unchecked module "cell2sparse_" of the Mastrave modelling library
Copyright © 2007,2008,2009,2010,2011 Daniele de Rigo
The file cell2sparse_.m is part of Mastrave.
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sparse_vals = cell2sparse_( cell_vals , cell_rows =  , siz =  )
Utility to transform a numeric vector or cell-array of numeric vectors cell_vals into a sparse matrix sparse_vals . If cell_vals is a numeric vector then the corresponding returned sparse matrix has a single column whose nonzero elements are the vector elements. If cell_vals is a cell-array then the returned sparse matrix has a number of columns equal to the number of numeric vectors which compose as elements the cell-array. The row position of each nonzero element of sparse_vals is determined by the input argument cell_rows containing the row indices (subscripts) -- if omitted, the values of i-th numeric vector of cell_vals are remapped as nonzero elements of the i-th column of sparse_vals starting from the first row and occupying contiguous rows in the same column.
cell_vals ::cellnumeric:: Numeric vector or cell-array of numeric vectors. cell_rows ::cellindex:: Vector of indices (or cell-array of indices vectors) representing the row position of the corresponding elements of cell_vals . If it is an empty array  , each numeric vector of cell_vals is remapped to fill the corresponding column of sparse_vals starting from the first row and occupying contiguous rows in the same column. If omitted, the default value is  . siz ::numel,2-vector:: Size of the returned sparse matrix sparse_vals . If it is an empty array  , the size is computed as the minimum one able to contain all the passed values. If omitted, the default value is  .
vnum = [ 1 5 4 8 3 ] lens = [ 3 0 4 3 0 0 9 0] N = sum( lens ) vcell = mat2cell( 10*[1:N] , 1 , lens ) cell_rows = mat2cell( [1:N] , 1 , lens ) cell2sparse_( vnum ) full( cell2sparse_( vcell ) ) % Passing the row position of each element full( cell2sparse_( vcell , cell_rows ) ) % Passing the size of sparse_vals full( cell2sparse_( vcell ,  , [15,10] ) ) full( cell2sparse_( vcell , cell_rows , [25,10] ) )
See also: cellstr2index, get_cell_elem, mat2groups Keywords: conversion, cell-array, sparse-matrix Version: 0.3.2
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