mmread

 function  [A] = mmread(filename)

 function  [A,rows,cols,entries,rep,field,symm] = mmread(filename)

      Reads the contents of the Matrix Market file 'filename'
      into the matrix 'A'.  'A' will be either sparse or full,
      depending on the Matrix Market format indicated by
      'coordinate' (coordinate sparse storage), or
      'array' (dense array storage).  The data will be duplicated
      as appropriate if symmetry is indicated in the header.

      Optionally, size information about the matrix can be 
      obtained by using the return values rows, cols, and
      entries, where entries is the number of nonzero entries
      in the final matrix. Type information can also be retrieved
      using the optional return values rep (representation), field,
      and symm (symmetry).