[R] defining and plotting functions thanks to equation

2003-07-28 Thread vincent . stoliaroff
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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Re: [R] defining and plotting functions thanks to equation

2003-07-28 Thread 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 Stephensontel +44 (0) 1524 593950
Department of Mathematics and Statistics   fax +44 (0) 1524 592681
Lancaster University  [EMAIL PROTECTED]
Lancaster LA1 4YF  http://www.maths.lancs.ac.uk/~stephena/


On Mon, 28 Jul 2003 [EMAIL PROTECTED] 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}}
 
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