Many thanks Serge :) That worked great! Helps to see how the syntax should work.
Cheers Lester On 12 December 2012 22:29, Serge Steer <[email protected]> wrote: > I think the following code fullfil your wish... > > > n = 0:1:20 ;// series in the expansionB = 1.5; //beta factorTm = 1300*274.15; > //base-lithosphere temperature [C]tau = 62.8; //lithosphere cooling thermal > decay constant [Ma]a = 125000; //equilibrium lithospheric thickness [m]alpha > = 3.28e-5 ;//thermal expansion coefficient K^-1// Tm needs to be converted to > Kelvin - multiply by 274.15rho = 3300;t = 0:5:150; //lithosphere age [Ma]G = > 6.67e-11; > // LTGA with increasing age of oceanic lithosphere > c=8*G*alpha*rho*a*Tm/%pi;m=(0:20)';m1=2*m+1;g=c*sum((B./(m1.^3*%pi).*sin(m1*%pi/B))*ones(t).*exp(-(m1.^2*t/tau)),1);clf;plot(t,g) > > > Serge Steer > ------------------------------ > > *De: *"Lester Anderson" <[email protected]> > *À: *"International users mailing list for Scilab." < > [email protected]> > *Envoyé: *Mardi 11 Décembre 2012 08:16:01 > *Objet: *[Scilab-users] Summation query in Scilab > > > Hello, > > I have an equation structured like in the attached, however I am unsure of > the correct syntax to compute in Scilab. > > One can calculate the first term of the expansion but obvioulsy it needs > to go to a large number (approximating infinity eg 20). > I am sure this is something very straightforward! > > Any ideas welcome. > > Thanks for the help > > Lester > > att: image of equation, test code > > _______________________________________________ > users mailing list > [email protected] > http://lists.scilab.org/mailman/listinfo/users > > > > _______________________________________________ > users mailing list > [email protected] > http://lists.scilab.org/mailman/listinfo/users > >
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