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Determine unknown integral limits

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Adam
Adam 2014 年 8 月 20 日
Dear all,
I calculated the integral from x(1) to x(end) of a given function as fellow:
syms a1 a2
Int1=quad(@ppval,x(1),x(end),[],[],pp)
So Int1 is now known.
I would like to take only 30 % of this integral and find the unknown upper limit (a2):
% Find the uper limit of the integral [0,a2], a2 is unkown
fun1=@(a2)quad(@ppval,0,a2,[],[],pp)-0.30*Int1
funq1=@(a2)fun1
a2=fzero(funq1(a2),[0,x(end)])
Assuming that now I would like to find a1 and b2:
How can I do it.
I highly appreciate your helps.
cheers
Adam

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