[R] solver in R

[Richard Rowe]

library(MASS) check out fitdistr( )  ... ?fitdistr
This isn't 'solver', but then again R isn't MS Excel!

Roslina Zakaria wrote:
> Dear R-users,
> Is there any function in R that works similarly like solver in Excel.  I have a set of daily rainfall data and I would like to estimate alpha and beta for the gamma function.
>
> Here is my daily rainfall data:
> [1]  0.2  1.2  0.0  0.0  0.0  0.0  0.0  0.6  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  4.8  1.6  0.0  1.8  1.8  0.0  2.6
>  [24] 33.0 19.0  0.0  0.0  0.6  0.0  0.0  6.8  0.2  0.0  0.0  0.0  0.0  0.2  0.0  0.0  0.0  0.0  0.0  0.0  1.6  5.4  0.0
>  [47]  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.2  0.0  0.0  6.0  6.6  0.0  0.0  0.0  0.0  0.2  0.0  0.0  0.0  0.0
>  [70]  0.0  0.0  0.0  0.0  0.0  0.0  0.0 12.8  0.0  0.0  0.0  0.0  0.0  0.0  0.2  0.0  3.8  2.2  1.2 12.2  3.0  0.0  0.0
>  [93]  0.0  0.0  5.0  3.6  0.0  0.0  0.0  1.8  1.8  1.2  1.2  1.6  3.6  0.2  0.8  0.0  0.0  0.0  0.0  0.0  1.4 16.6  0.0
> [116]  1.6  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.8  5.4
> [139]  1.6  5.8  0.4 34.2  0.0  0.4  0.4  1.4  1.8  0.0  0.0  0.2  0.0  2.4 24.2  0.4  0.0  0.0  0.0  1.6  0.0  0.0  0.0
> [162]  0.0  0.2  0.0  0.0  0.0  4.4  0.0  4.4 21.2  3.0  0.4  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0
> [185]  0.0  0.8  0.8  3.6  0.0  1.2  0.0  0.0  0.0  0.0  0.0  0.0 13.8  1.6  6.6  5.0  0.0  1.2  0.0  1.0  1.2  2.4  6.0
> [208]  2.8  7.0  0.2  0.6  0.0  0.0  0.0  0.0  0.0  3.2  0.2  2.4  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  2.0
> [231]  0.0  0.0  0.0  0.0  0.0  0.0  0.0  1.2  6.6  2.4  1.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  1.6  0.0  0.0  0.0
> [254]  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.4  2.6  0.0  0.6  4.8  0.0  0.2  3.8 17.0  0.2  0.0  0.0  0.0
> [277] 43.6  2.6  0.0  0.0  0.0  0.4  8.2 14.4  0.2  0.0  0.0  0.0  1.8  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  1.2
> [300]  0.0
>
> Thank you in advance for your help.
>
>
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-- 
Dr Richard Rowe
Zoology & Tropical Ecology
School of Marine & Tropical Biology
James Cook University
Townsville 4811
AUSTRALIA

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