Expect 2 output arguments Unknown or unsupported ARPACK function Expect at least 1 input argument Could not convert fcn to character vector arpackc(''d*aupd'',...) expects 16 other input arguments Could not convert bmat to character vector Could not convert which to character vector arpackc(''dseupd'',...) expects 21 other input arguments Could not convert howmny to character vector arpackc(''dneupd'',...) expects 23 other input arguments arpackc(''znaupd'',...) expects 17 other input arguments arpackc(''zneupd'',...) expects 23 other input arguments ARPACK is not supported on this computer.