[R] defining and plotting functions thanks to equation

[Alec Stephenson]

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.
> 
> 
> 
> 
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