```Date: Sep 21, 2013 4:19 AM
Author: Murray Eisenberg
Subject: Re: plotting integrals

Perhaps trying to evaluate the integrand at one particular value will give a clue to what's wrong:  Subscript[\[Eta], B][0, 1, 3]NIntegrate::itraw : Raw object 0 cannot be used as an iteratorSqrt[1 - NIntegrate[\[Psi]1[0, 1, 3]*\[Psi][0, 1*Sqrt[2*3*(3 - 1)]], {0, -Pi/2, Pi/2}]]You're trying to integrate a function of "variable" that's actually the constant 0 !On Sep 20, 2013, at 7:07 AM, Herman <btta2010@gmail.com> wrote:> Dear All,>> I would like to plot the function Subscript[\[Eta], B] but I got errors.> Could someone please help me with these errors?>>> \[Psi][x_, \[Omega]_] := (\[Omega]/\[Pi])^(1/4)>  Exp[-1/2 \[Omega] x^2]>> \[Psi]1[x_, a_, n_] := Sqrt[(2 n)!!/((2 n - 1)!! \[Pi])] Cos [a*x]^n>> Subscript[F, TPT][x_, a_, n_] :=> NIntegrate[\[Psi]1[x, a, n]*\[Psi][x,>    a*Sqrt[2 n (n - 1)]], {x, -\[Pi]/2, \[Pi]/2}]>> Subscript[\[Eta], B][x_, a_,>  n_] := Sqrt[(1 - Subscript[F, TPT][x, a, n])]>> Plot[Subscript[\[Eta], B][x, 1, 3], {x, -\[Pi]/2, \[Pi]/2}]---Murray Eisenberg                                    murray@math.umass.eduMathematics & Statistics Dept.      Lederle Graduate Research Tower           University of Massachusetts 710 North Pleasant Street  Amherst, MA 01003-9305
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