Re: gamma_inc for octave

[OYEDAPO OLUFEMI]

Thank you so much. The gamma_inc function is fine. All i did was just to install the gsl package for octave. Thanks a million.

 

James

On Wed, 09 Jan 2013 09:27:34 -0700, Alexander Hansen wrote:

> On 1/9/13 9:20 AM, James Sherman Jr. wrote:
> > On Wed, Jan 9, 2013 at 10:49 AM, OYEDAPO OLUFEMI <address@hidden> wrote:
> > > Hi, Can anyone help me with how to use the upper bound incomplete gamma function "gamma_inc(..)"?. I want to use this function in octave, but it says its not defined. I have installed GSL yet i couldn't get it worked. Any suggestion? J _______________________________________________ Help-octave mailing list address@hidden https://mailman.cae.wisc.edu/listinfo/help-octave
> > Unless it is just a typo in your email, I think the function you're looking for is "gammainc", no underscore in the function name. At least in my octave installation (3.6.0), I get, when looking for the gammainc function: octave:1> help gammainc `gammainc' is a function from the file D:\Octave\Octave3.6.0_gcc4.6.2\lib\octave \3.6.0\oct\i686-pc-mingw32\gammainc.oct -- Mapping Function: gammainc (X, A) -- Mapping Function: gammainc (X, A, "lower") -- Mapping Function: gammainc (X, A, "upper") Compute the normalized incomplete gamma function, Hope this helps, James Sherman _______________________________________________ Help-octave mailing list address@hidden https://mailman.cae.wisc.edu/listinfo/help-octave
> There's a gamma_inc in the gsl package from Octave Forge:
>
> octave:1> help gamma_inc
> `gamma_inc' is a function from the file
> /sw/lib/octave/3.6.3/packages/gsl-1.0.8/x86_64-apple-darwin-api-v48+/gsl_sf.oct
>
>  -- Loadable Function: Z = gamma_inc (X, Y)
>  -- Loadable Function: [Z, ERR] = gamma_inc (...)
>      These functions compute the incomplete Gamma Function the
>      normalization factor included in the previously defined functions:
>      \Gamma(a,x) = \int_x\infty dt t^{a-1} \exp(-t) for a real and x >=
>      0.
>
>      ERR contains an estimate of the absolute error in the value Z.
>
>      This function is from the GNU Scientific Library, see
>      `http://www.gnu.org/software/gsl/' for documentation.
>
> Is the gsl package loaded?