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<p><font size="+1"><font face="Times New Roman, Times, serif">Does
anyone have any feedback on how to access the condition
numbers that </font></font><font face="Times New Roman,
Times, serif" size="+1">dgeevx_lapack should be able to
calculate?</font></p>
<p><font face="Times New Roman, Times, serif" size="+1">Thanks<br>
Andy<br>
</font></p>
<div class="moz-cite-prefix">On 02/20/2017 06:20 PM, Andy Miller
wrote:<br>
</div>
<blockquote cite="mid:8fa3d85b-8226-d5ec-2688-c3297bb515bf@mit.edu"
type="cite">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<p><font face="Times New Roman, Times, serif">The argument I am
confused by is called "sense". The Fortran description reads
as follows:</font></p>
<p><font face="Times New Roman, Times, serif">SENSE (input)
CHARACTER*1<br>
* Determines which reciprocal condition numbers are
computed.<br>
* = 'N': None are computed;<br>
* = 'E': Computed for eigenvalues only;<br>
* = 'V': Computed for right eigenvectors only;<br>
* = 'B': Computed for eigenvalues and right
eigenvectors.<br>
* If SENSE = 'E' or 'B', both left and right
eigenvectors<br>
* must also be computed (JOBVL = 'V' and JOBVR =
'V').<br>
</font></p>
<p><font face="Times New Roman, Times, serif">The other arguments
produce reasonable results and, most importantly, change the
output in a way I can follow. Changing the 5th or sense
argument doesn't seem o have any effect.<br>
<br>
</font></p>
<div class="moz-cite-prefix">On 2/20/2017 5:49 PM, Dennis Shea
wrote:<br>
</div>
<blockquote
cite="mid:8285BEBB-4838-4ED8-9945-5D1EF5D1B547@ucar.edu"
type="cite">
<div>Offline. </div>
<div id="AppleMailSignature">I am out most of the week. I have
no access to a computer till later. Can u pls click on the
'dgeevx' link in the function documentation? This gives the
Fortran documentation. What arguments are you asking about?<br>
<br>
Sent from my iPhone</div>
<div><br>
On Feb 20, 2017, at 1:57 PM, Andy <<a
moz-do-not-send="true" href="mailto:awmiller@mit.edu">awmiller@mit.edu</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div>
<p><font face="Times New Roman, Times, serif" size="+1">Hello,<br>
I am running NCL version 6.3.0 on a Linux (Ubuntu)
machine with a bash shell. I am trying to use the
dgeevx_lapack function for the first time. The
documentation includes an option to calculate reciprocal
condition numbers. Enabling that option will not lead to
any error messages, but I also can't find the result of
that calculation. Running the command in the following
three versions:</font></p>
<p><font face="Times New Roman, Times, serif" size="+1">evl
= dgeevx_lapack(M,"N","V","V","N",False)</font></p>
<p><font face="Times New Roman, Times, serif" size="+1">evl
= dgeevx_lapack(M,"N","V","V","E",False)</font></p>
<p><font face="Times New Roman, Times, serif" size="+1">evl
= dgeevx_lapack(M,"N","V","V","B",False)</font></p>
<p><font face="Times New Roman, Times, serif" size="+1">for
any given matrix M results in variables evl that contain
the same number of values and are seemingly identical
otherwise, too.</font></p>
<p><font face="Times New Roman, Times, serif" size="+1">How
can I access the reciprocal condition numbers? Is there
another ncl function I should use?</font></p>
<p><font face="Times New Roman, Times, serif" size="+1">Thanks
for your help,<br>
Andy</font></p>
<pre class="moz-signature" cols="72">--
Andy Miller
MIT PAOC PhD Candidate
77 Massachusetts Ave | 54-1715
Cambridge, MA 02139
Phone: 617-253-3715
Email: <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:awmiller@mit.edu">awmiller@mit.edu</a></pre>
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