https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/packed-storage/m-p/848664#M6402 <P>You need to provide a bit more context such as for what function. Are you referring to the symmetric linear solvers in LAPACK? For ?potrf, the matrix is stored full. However, for the packed cases, ?pptrf, you have the option of providing either the upper or lower matrix. In either case the data is stored by columns.</P> <P>Bruce</P> Mon, 02 Jul 2007 16:48:19 GMT Intel_C_Intel 2007-07-02T16:48:19Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/packed-storage/m-p/848663#M6401 If A is a symmetric matrix:<BR /><BR /><FONT face="Courier New"><B> 1 2 3 1 2 3<BR />A= 2 5 4 Up part = 5 4<BR /> 3 4 6 6</B><BR /><BR /><FONT face="Times New Roman">what is the form for the packed storage array of A?<BR /><BR /><FONT face="Courier New"><B>[1 2 5 3 4 6] (for col)</B><BR /></FONT><BR />or<BR /><BR /><B><FONT face="Courier New">[1 2 3 5 4 6] (for row)</FONT></B><BR /><BR /><BR />?</FONT></FONT> Mon, 02 Jul 2007 13:31:22 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/packed-storage/m-p/848663#M6401 anacondgame 2007-07-02T13:31:22Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/packed-storage/m-p/848664#M6402 <P>You need to provide a bit more context such as for what function. Are you referring to the symmetric linear solvers in LAPACK? For ?potrf, the matrix is stored full. However, for the packed cases, ?pptrf, you have the option of providing either the upper or lower matrix. In either case the data is stored by columns.</P> <P>Bruce</P> Mon, 02 Jul 2007 16:48:19 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/packed-storage/m-p/848664#M6402 Intel_C_Intel 2007-07-02T16:48:19Z