<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Jed,</div></span></span>
</div><div><br class="webkit-block-placeholder"></div><div>I need to have this form for the simple input for PDSLin.</div><div><br></div><div>What do you mean by "COO"?</div>
<div><br></div>Any examples to show how to pull that new array for reading from the AIJ structure?<div><br></div><div>Thanks a lot!</div><div><br></div><div>R</div><div><br><div><div>On Jul 14, 2011, at 11:28 AM, Jed Brown wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div class="gmail_quote">On Thu, Jul 14, 2011 at 13:18, Xuefei (Rebecca) Yuan <span dir="ltr"><<a href="mailto:xyuan@lbl.gov">xyuan@lbl.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div id=":171">I would like to store this sparse MXN matrix A in the following form:<br>
....................................................<br>
<br>
line1: M N numberofnonzeros<br>
line2: i j value<br>
line3: i j value</div></blockquote></div><br><div>This "COO" format is not an efficient representation. Why do you want to store it this way?</div><div><br></div><div>(You can produce this by getting the AIJ structure, allocating a new array for the row indices, and filling it redundantly from the AIJ structure.</div>
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