Dear Amireh,<div>  What are the types of u and v? I suspect you have Function for both when you need TestFunction and TrialFunction?</div><div><br></div><div>All the best</div><div>Cjc</div><div><br>On Wednesday, 1 August 2018, Amireh Mousavi &lt;<a href="mailto:amireh.mousavi@math.iut.ac.ir">amireh.mousavi@math.iut.ac.ir</a>&gt; wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

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<div dir="ltr">Dear Firedrake team,</div>
<div dir="ltr">i&#39;m trying to get u*v*dx as a array which each component is amount of the integral on each element. I want to do that in order to compute error indicator.<br>In dolfin implementation it be done like:<br>assemble(u*v*dx).array()</div>
<div dir="ltr">Is there a way to do this in Firedrake?</div>
<div dir="ltr">Runing the above code in Firedrake gives:</div>
<div dir="ltr"><em>AttributeError: &#39;numpy.float64&#39; object has no attribute &#39;array&#39;</em></div>
<div dir="ltr">Thank you in advance.</div>
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<div dir="ltr">Best,</div>
<div dir="ltr">Amireh</div>
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</blockquote></div><br><br>-- <br><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>Colin Cotter</div><div>Department of Mathematics</div><div>Imperial College London</div><div><br></div><div>I don’t expect a reply to this email from you outside of your normal working hours.<br></div><div><br></div><div><a href="http://www.imperial.ac.uk/people/colin.cotter" target="_blank">http://www.imperial.ac.uk/people/colin.cotter</a><br><br><a href="http://www.cambridge.org/9781107663916" target="_blank">www.cambridge.org/9781107663916</a><br></div></div></div></div></div></div></div></div><br>