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Re: [Maxima-discuss] dblquad fail
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From: |
Ether Jones |
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Subject: |
Re: [Maxima-discuss] dblquad fail |
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Date: |
Thu, 28 Jul 2016 04:54:27 -0700 (PDT) |
Thank you.
This works:
octave-3.6.4.exe:3> I = dblquad(@(r,q)abs(
r.*sqrt(r.^2+1-2*cos(2*pi*q))),0,1,0,1)
I = 0.586626703381746
... but this doesn't:
octave-3.6.4.exe:4> I =
dblquad(@(r,q)r.*sqrt(r.^2+1-2*cos(2*pi*q)),0,1,0,1)
error: quadcc: integrand F must return a single, real-valued vector
error: called from:
error: K:\OctaveVS\share\octave\3.6.4\m\general\dblquad.m at line 72,
column 10
error: at line -1, column -1
error: quadcc: integrand F must return a single, real-valued vector
error: K:\OctaveVS\share\octave\3.6.4\m\general\dblquad.m at line 65,
column 5
Why is the abs() necessary?
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