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Click Add.
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Click Study.
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Click Done.
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Click Plot.
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Locate the Thermodynamics, Solid section. From the ρ list, choose User defined. In the associated text field, type 1.
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Click in the Graphics window and then press Ctrl+A to select both boundaries.
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Click to expand the Coloring and Style section. Find the Line markers subsection. From the Marker list, choose Cycle.
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Locate the y-Axis Data section. In the Expression text field, type sqrt(intop1((T-2*sum((-1)^n/((n+0.5)*pi)*exp(-(n+0.5)^2*pi^2*t)*cos((n+0.5)*pi*x),n,0,1000))^2))/sqrt(intop1(T^2)).
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Select the Description check box.
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In the associated text field, type L2 error from analytical solution.
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