<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><br class=""></div> Not really. There are tools to make it easier to do computations on individual fields in the field-coupling order such as <a href="https://petsc.org/release/docs/manualpages/Vec/VecStrideGatherAll.html" class="">https://petsc.org/release/docs/manualpages/Vec/VecStrideGatherAll.html</a> and its many friends and relations. <div class=""><br class=""></div><div class=""> What task or set of computations motivates you to want to use a field-split storage format as the base format instead of the field-coupling?</div><div class=""><br class=""></div><div class=""> Barry</div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Aug 14, 2022, at 11:30 PM, <a href="mailto:lei.xu@siat.ac.cn" class="">lei.xu@siat.ac.cn</a> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><div style="caret-color: rgb(0, 0, 0); font-family: "Microsoft YaHei UI"; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span class=""></span>Dear all,</div><div style="caret-color: rgb(0, 0, 0); font-family: "Microsoft YaHei UI"; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: "Microsoft YaHei UI"; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">I am trying to compute a matrix for KSP based on DMDACreate2d. Can I organize the solution vector in a component-wise (field-splitting) order instead of point-wise (field-coupling) order.</div><div style="caret-color: rgb(0, 0, 0); font-family: "Microsoft YaHei UI"; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: "Microsoft YaHei UI"; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Best wishes,</div><div style="caret-color: rgb(0, 0, 0); font-family: "Microsoft YaHei UI"; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: "Microsoft YaHei UI"; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Lei</div><div style="caret-color: rgb(0, 0, 0); font-family: "Microsoft YaHei UI"; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><hr size="1" align="left" style="caret-color: rgb(0, 0, 0); font-family: "Microsoft YaHei UI"; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; width: 210px; height: 1px;" class=""><div style="caret-color: rgb(0, 0, 0); font-family: "Microsoft YaHei UI"; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span class=""><div style="margin: 10px;" class=""><div style="font-size: 14px; line-height: normal;" class=""><font face="Times New Roman" class="">Lei Xu, PhD</font></div><div style="font-size: 14px; line-height: normal;" class=""><font face="Times New Roman" class="">Assistant Professor</font></div><div style="font-size: 14px; line-height: normal;" class=""><br class=""></div><div style="font-size: 14px; line-height: normal;" class=""><font face="Times New Roman" class="">Laboratory for Engineering and Scientific Computing</font></div><div style="font-size: 14px; line-height: normal;" class=""><font face="Times New Roman" class="">Shenzhen Institutes of Advanced Technology</font></div><div style="font-size: 14px; line-height: normal;" class=""><font face="Times New Roman" class="">Chinese Academy of Sciences</font></div><div style="font-size: 14px; line-height: normal;" class=""><font face="Times New Roman" class="">Address: 1068 Xueyuan Avenue, Shenzhen University Town, Shenzhen, Guangdong (518055), P. R. China</font></div><div style="font-size: 14px; line-height: normal;" class=""><font face="Times New Roman" class="">E-mail: <a href="mailto:lei.xu@siat.ac.cn" class="">lei.xu@siat.ac.cn</a></font></div></div></span></div></div></blockquote></div><br class=""></div></body></html>