On Mon, Feb 23, 2009 at 8:26 PM, Barry Smith <span dir="ltr"><<a href="mailto:bsmith@mcs.anl.gov">bsmith@mcs.anl.gov</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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Vectors have all entries equal to zero. Dense matrices have all entries equal to zero. Sparse matrices have no entries (logically this is the same as entries equal to zero).<font color="#888888"></font></blockquote><div>
<br>We do not automatically zero the entires upon allocation. You have to call VecZeroEntries() or VecSet()<br>to initialize the vector.<br><br> Matt<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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Barry</font><div><div></div><div class="Wj3C7c"><br>
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On Feb 23, 2009, at 8:24 PM, Yixun Liu wrote:<br>
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<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi,<br>
What's the initial value when I create a matrix or vector?<br>
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Thanks.<br>
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</div></div></blockquote></div>-- <br>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener<br>