[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
## Re: Numerical Integration

**From**: |
Ivan Sutoris |

**Subject**: |
Re: Numerical Integration |

**Date**: |
Sat, 6 Dec 2008 19:57:38 +0100 |

On Sat, Dec 6, 2008 at 6:26 PM, Marcin Ślęczka <address@hidden> wrote:
>
>* I'm a beginner on using the Octave. I've a problem with numerical integration*
>* of such a function:*
>* \int_0^1 dt \frac{1}{t^{3/2}}\exp[-iR(t)]\frac{1}{(1+R^2(t))^2} where*
>* R(t)=\int_0^t dx e^{-x^2}\sin(at+b) (tex code)*
>* I've no idea how to integrate this. Every help will be usefull.*
>* Thanks for help*
Hi
You can integrate univariate function with 'quad' command. You need to
define function under integral (e.g. by programming it in separate
m-file), see 'help quad' for details. Looking at your function, R(t)
seems to be a multiply of error function which is available directly
in Octave (see 'help erf'), so you don't have to compute the second
integral.
Regards
Ivan Sutoris

**Numerical Integration**, *Marcin Ślęczka*, `2008/12/06`
**Re: Numerical Integration**,
*Ivan Sutoris* **<=**
**Re: Numerical Integration**, *Marcin Ślęczka*, `2008/12/06`
**Re: Numerical Integration**, *Ivan Sutoris*, `2008/12/07`
**Re: Numerical Integration**, *Søren Hauberg*, `2008/12/07`
**Re: Numerical Integration**, *Jaroslav Hajek*, `2008/12/07`
**Re: Numerical Integration**, *Søren Hauberg*, `2008/12/07`
**Re: Numerical Integration**, *Jaroslav Hajek*, `2008/12/07`
**Re: Numerical Integration**, *Carlo de Falco*, `2008/12/07`
**Re: Numerical Integration**, *John W. Eaton*, `2008/12/10`
**Re: Numerical Integration**, *Jaroslav Hajek*, `2008/12/11`
**Re: Numerical Integration**, *John W. Eaton*, `2008/12/11`