<div dir="ltr"><br><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Mar 19, 2013 at 11:10 AM, Robert Flintham <span dir="ltr"><<a href="mailto:Robert.Flintham@uhb.nhs.uk" target="_blank">Robert.Flintham@uhb.nhs.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div link="blue" vlink="purple" lang="EN-GB"><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Hi,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">I’m trying to run the following, with <an array> representing an array of floating point numbers:<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">------------------------------------------------------------<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">import numpy as np<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">import scipy as sp<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">from scipy import optimize<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">xdata=<an array><u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">ydata=<an array><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">def t2fit(x,T2,A):<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">    return A * np.exp(-x/T2)<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">popt, pcov = optimize.curve_fit(t2fit, xdata, ydata, p0=None, sigma=None)<u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:10.0pt;font-family:"Arial","sans-serif"">------------------------------------------------------------<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">But I’m getting an ImportError:<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Traceback (most recent call last):<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">  File "K:\eclipse\plugins\org.python.pydev_2.7.1.2012100913\pysrc\pydevd.py", line 1397, in <module><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">    debugger.run(setup['file'], None, None)<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">  File "K:\eclipse\plugins\org.python.pydev_2.7.1.2012100913\pysrc\pydevd.py", line 1090, in run<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">    pydev_imports.execfile(file, globals, locals) #execute the script<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">  File "K:\eclipse\plugins\org.python.pydev_2.7.1.2012100913\pysrc\_pydev_execfile.py", line 38, in execfile<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">    exec(compile(contents+"\n", file, 'exec'), glob, loc) #execute the script<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">  File "K:\PROGRAMMING\MRI_Python\fatfrac.py", line 7, in <module><u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:10.0pt;font-family:"Arial","sans-serif"">    from scipy import optimize<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">  File "K:\Python33\lib\site-packages\scipy\optimize\__init__.py", line 147, in <module><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">    from ._minimize import *<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">  File "K:\Python33\lib\site-packages\scipy\optimize\_minimize.py", line 29, in <module><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">    from .lbfgsb import _minimize_lbfgsb<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">  File "K:\Python33\lib\site-packages\scipy\optimize\lbfgsb.py", line 40, in <module><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">    from . import _lbfgsb<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">ImportError: DLL load failed: The specified module could not be found.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> </span></p></div></div></blockquote><div><br></div><div>Looking at the paths, it looks like some packages are for p 2.7 and some for p 3.3 <br>
</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div link="blue" vlink="purple" lang="EN-GB"><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">I’ve checked the path, and the file lbfgsb.py is definitely at that location (as are optimize.py and _minimize.py).  Does anyone know why I’m getting the error?<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">All the best,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Rob<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#663399">Robert Flintham<br>Trainee Clinical Scientist - MRI</span></b><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
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<br></blockquote></div><br><br clear="all"><br>-- <br><div dir="ltr"><div>Joel Goldstick<br></div><a href="http://joelgoldstick.com" target="_blank">http://joelgoldstick.com</a><br></div>
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