On Sep 28, 2009, at 8:49 PM, David Winsemius wrote:
On Sep 28, 2009, at 6:22 PM, Dmitry Gospodaryov wrote:
Does exist any tool in R to solve equations, especially complex
exponential equations?
For example:
y = 100*exp(b*(1-exp(c*x))/c)
If you plot that function, you see that it is asymptotically zero in
its positive domain:
> b=10; c=1
> plot(-10:10, 100*exp(b*(1-exp(c*(-10:10)))/c))
> 100*exp(b*(1-exp(c*(-10:10)))/c)
[1] 2.201647e+06 2.199930e+06 2.195270e+06 2.182652e+06
2.148720e+06 2.059123e+06
[7] 1.834007e+06 1.338820e+06 5.691034e+05 5.562432e+04
1.000000e+02 3.448235e-06
[13] 1.789295e-26 1.295885e-81 1.683418e-231 0.000000e+00 0.000000e
+00 0.000000e+00
[19] 0.000000e+00 0.000000e+00 0.000000e+00
... So that raises the question of what you are really trying to
accomplish.
If it is so, then what is the package i have to
use and what is algorythm for this solving?
Thank you for advance.
With regard, Dmitry.
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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