R help - Jul 2003 - defining and plotting functions thanks to equation

Hi R lovers!

Are there any means to define and plot a function given the equation that
specifies the function?

For example I'd like to plot and work with the Gumbel Distribution density
defined by
Lambda(x)=exp(-exp(-x))

My question may appear very simple but I haven't got an idea yet about how
to do that. I could plot something with x a vector/set of value but I don't
know how to proceed with x belonging to a continuous interval

Thanks for any help.




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The cdf of the Gumbel distribution is exp(-exp(-x)), not the density.
The easiest way to plot the density is probably to download package evd
and use


library(evd)
plot(dgumbel, -2, 5)


Alec Stephenson                            tel +44 (0) 1524 593950
Department of Mathematics and Statistics   fax +44 (0) 1524 592681
Lancaster University                  a.stephenson at lancaster.ac.uk
Lancaster LA1 4YF          http://www.maths.lancs.ac.uk/~stephena/


On Mon, 28 Jul 2003 vincent.stoliaroff at sgcib.com wrote:
> Hi R lovers!
> 
> Are there any means to define and plot a function given the equation that
> specifies the function?
> 
> For example I'd like to plot and work with the Gumbel Distribution
density
> defined by
> Lambda(x)=exp(-exp(-x))
> 
> My question may appear very simple but I haven't got an idea yet about
how
> to do that. I could plot something with x a vector/set of value but I
don't
> know how to proceed with x belonging to a continuous interval
> 
> Thanks for any help.
> 
> 
> 
> 
> ******************************************************************
> The sender's email address has changed to 
> firstname.lastname@ sgcib.com. You may want to update your 
> personal address book. Please see http://www.sgcib.com for more 
> information.
>                                **
> This message and any attachments (the "message") are
confide...{{dropped}}
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>

vincent.stoliaroff at sgcib.com wrote:
> Are there any means to define and plot a function given the equation that
> specifies the function?
> 
> For example I'd like to plot and work with the Gumbel Distribution
density
> defined by
> Lambda(x)=exp(-exp(-x))
Like this?

curve(exp(-exp(-x)),0,10,101)

Cheers

Jason
-- 
Indigo Industrial Controls Ltd.
64-21-343-545
jasont at indigoindustrial.co.nz