Integration of a Series Sum

2 visualizaciones (últimos 30 días)
Thomas
Thomas el 12 de Dic. de 2012
I want to write a series sum in terms of a variable that I will integrate numerically:
syms q
fun = @(k) symsum(k*q,q,0,10)
integral(fun,0,1)
How can this be done?

Respuesta aceptada

Walter Roberson
Walter Roberson el 12 de Dic. de 2012
Editada: Walter Roberson el 12 de Dic. de 2012
sum(k*q,q,0,10) is going to be k * sum(q,q,0,10) which is going to be k * (10 * (10+1) / 2) which is going to be 45*k
integral(45*k, k, 0, 1) is going to be 45*k^2/2 evaluated at 1, which will be 45/2 .
Anyhow:
syms k q
fun = matlabFunction( symsum(k*q, q, 1, 10), 'vars', k);
and then integrate fun
  1 comentario
Thomas
Thomas el 12 de Dic. de 2012
Unfortunately, the real series is rather more complicated, but thanks to your quick response, I hope Matlab will be able to handle it numerically. Thanks again.

Iniciar sesión para comentar.

Más respuestas (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by