Re: Question regarding Compile

*To*: mathgroup at smc.vnet.net*Subject*: [mg33741] Re: Question regarding Compile*From*: Madhusudan Singh <ar at sc.hc.de>*Date*: Wed, 10 Apr 2002 00:50:05 -0400 (EDT)*Organization*: University of Michigan Electrical Engineering and Computer Science*References*: <a8m33c$oaq$1@smc.vnet.net> <a8tt4m$fmg$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Thanks for your response. > > You can not do *what* ? and what may > > f5 = Compile[{{x, _Real}}, Sin[x]] > > f[x_] := x^2 > > Plot[f[f5[x]], {x, 0, Pi}] > > do ? This works. I was using a syntax like : Compile[{x}, expression] as the help stated that _Real was the default. However, it seems that I need to write it as ; Compile[{x,_Real},expression]. That said, the expressions that I am working with, are : integrand := Compile[{{y, _Real}, {x1, _Real}, {x2, _Real}}, f1[pl[argument[y]] + x1, x2, c]]; pl[] is an array, f1 and argument are functions (fairly simple functions). c is a constant. answer1[x1_, x2_] := Exp[-2 Integrate[integrand[y, x1, x2], {y, a, b}]]; a=0, b~1e-8 I get an error : CompiledFunction::cfsa: Argument y at position should be a machine-size real number. when I try to use answer1 with jt3=q NIntegrate[v[x1, 50, 0.2] g3[0.2, x1, 50] partjt3[x1] answer1[0.0, x1], {x1, 50, maxpl + dummyinfinity}, Method -> MonteCarlo, MaxPoints -> 10000]; v, g3, partjt3 are simple functions. As you can see, this is quite complicated. However, since a and b are fixed numbers, and nowhere near machine precision, I do not not understand the error above. This is leading to other errors later. Any ideas ? Thanks again.