[R] applying uniroot function to each element in vector

[David Winsemius]

On Apr 27, 2011, at 11:54 AM, Dale wrote:

> If I have a vector of n elements, e.g. a vector of length 4 with  
> elements 10,
> 20, 30, 40 and want to find the different values of x such that  
> x^2=10,
> x^2=20, x^30 and x^2=40, how could I do this in R? I'm thinking of  
> using the
> uniroot function, but am finding difficult applying it to a vector.  
> Thanks

I find myself scratching my head wondering why the answer is not:

y=c(10,20,30,40)
x=sqrt(y)
x

>
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David Winsemius, MD
West Hartford, CT