[scilab-Users] Finding an integration limit

[Michael J. McCann]

Since you are looking for the lower limit of integration to give a 
particular value of the integral, I suggest you first plot the value 
of the integral as a function of the lower bound and see where the 
answer lies. Then you can decide how to find the "exact" value. In 
principle solving for the root as you suggest is fine, but there 
could be many or none and that could involve a lot of wasted useless 
computation, so first see (literally) what you are looking for.
Mike.
===================================
At 09:35 2008-09-04, you wrote:
>Hello
>
>I have a problem. I want to find a value of integration limit.
>
>The problem is:
>
>B=intg(r,W,f).
>
>Values of B and W are known, function f is given. I want to find r.
>Maybe it is possible to rewrite the expresion as: B-intg(r,W,f)=0 and
>to find the root of this expression with respect to r. If anyone
>knows, how to do it, I would be extremely grateful for any help. I am
>a newbie to Scilab, and maybe there are some manuals where I could
>find solution to this problem, but I do not know where to find them
>:).
>
>Thank you
>Krzysiek
>
>______________________________________________________________________
>This email has been scanned by the MessageLabs Email Security System.
>For more information please visit http://www.messagelabs.com/email
>______________________________________________________________________