On 09/14/2011 10:37 PM, Diviya Smith wrote:

> Hi there,

>

> I have a complex math equation which does not have a closed form solution.

> It is -

>

> y <- (p*exp(-a*d)*(1-exp((d-p)*(a-x[1]))))/((p-d)*(1-exp(-p*(a-x[1]))))

>

> For this equation, I have all the values except for x[1]. So I need to solve

> this problem numerically. Can anyone suggest an optimization package that I

> can use to estimate the value for x[1]?

>

> Thanks in advance,

>

> Diviya

>

> [[alternative HTML version deleted]]

>

> ______________________________________________

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https://stat.ethz.ch/mailman/listinfo/r-help> PLEASE do read the posting guide

http://www.R-project.org/posting-guide.html> and provide commented, minimal, self-contained, reproducible code.

Google for "R optimization".

Paul

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Paul Hiemstra, Ph.D.

Global Climate Division

Royal Netherlands Meteorological Institute (KNMI)

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http://intamap.geo.uu.nl/~paulhttp://nl.linkedin.com/pub/paul-hiemstra/20/30b/770______________________________________________

[hidden email] mailing list

https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide

http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.