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Razonar		#1 Posted : 04 June 2020 07:40:08(UTC)
Rank: Advanced Member Groups: Registered Joined: 28/08/2014(UTC) Posts: 973 Was thanked: 530 time(s) in 345 post(s)		Hi. This worksheet shows how to use an ode solver for evaluating a double integral over the region between two functions. DoubleIntegralRK.sm (43kb) downloaded 64 time(s). DoubleIntegralRK.pdf (220kb) downloaded 73 time(s). Best regards. Alvaro.
2 users thanked Razonar for this useful post.		on 04/06/2020(UTC),  on 04/06/2020(UTC)
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SteelCat		#2 Posted : 07 June 2020 19:21:46(UTC)
Rank: Advanced Member Groups: Registered Joined: 02/05/2020(UTC) Posts: 41 Was thanked: 3 time(s) in 3 post(s)		Thanks Alvaro for your example. Can the change of variable be put in the procedure definition?
		Physics is like sex. Sure, it may give some practical results, but that’s not why we do it. (R. Feynman)
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Jean Giraud		#3 Posted : 08 June 2020 01:50:25(UTC)
Rank: Guest Groups: Registered Joined: 04/07/2015(UTC) Posts: 6,082 Was thanked: 890 time(s) in 718 post(s)		Originally Posted by: SteelCat Can the change of variable be put in the procedure definition,? Like this: yes, just opposite plot. Double Switch [x, L].sm (7kb) downloaded 30 time(s).
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Razonar		#4 Posted : 18 June 2020 02:21:22(UTC)
Rank: Advanced Member Groups: Registered Joined: 28/08/2014(UTC) Posts: 973 Was thanked: 530 time(s) in 345 post(s)		Hi. This is the double integral using Gauss Legendre quadrature. GaussLegendreQuadrature.sm (61kb) downloaded 33 time(s). GaussLegendreQuadrature.pdf (161kb) downloaded 29 time(s). Best regards. Alvaro. Originally Posted by: SteelCat ... Can the change of variable be put in the procedure definition? Yes. DoubleIntegralSteelCat.sm (48kb) downloaded 36 time(s). DoubleIntegralSteelCat.pdf (106kb) downloaded 25 time(s).
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Jean Giraud		#5 Posted : 18 June 2020 17:26:19(UTC)
Rank: Guest Groups: Registered Joined: 04/07/2015(UTC) Posts: 6,082 Was thanked: 890 time(s) in 718 post(s)		Keisan has longer Legendre than 64, but couldn't copy/paste ? From other source: 63, 64. Integrate Legendre [ Wr 24 ].sm (29kb) downloaded 33 time(s).
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Razonar		#6 Posted : 19 June 2020 03:35:42(UTC)
Rank: Advanced Member Groups: Registered Joined: 28/08/2014(UTC) Posts: 973 Was thanked: 530 time(s) in 345 post(s)		Originally Posted by: Jean Giraud Keisan has longer Legendre than 64, but couldn't copy/paste ? From other source: 63, 64. Integrate Legendre [ Wr 24 ].sm (29kb) downloaded 33 time(s). Hi Jean. Yes, can copy and paste. Do that first into excel, and from there to the small SMathMatrixEditor and finally paste in SMath. In the attached Laguerre and Legendre coeffs for the Gauss method. DoubleIntegralJean.sm (26kb) downloaded 36 time(s). DoubleIntegralJean.pdf (46kb) downloaded 35 time(s). Best regards. Alvaro
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Jean Giraud		#7 Posted : 20 June 2020 13:39:28(UTC)
Rank: Guest Groups: Registered Joined: 04/07/2015(UTC) Posts: 6,082 Was thanked: 890 time(s) in 718 post(s)		Originally Posted by: Razonar Hi Jean. Yes, can copy and paste. Thanks, Amigo !
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