Re: [R] Adding "sum" to derivatives table

From: Martin C. Martin <martin_at_metahuman.org>
Date: Fri 05 Aug 2005 - 04:23:26 EST

Rolf Turner wrote:

>> deriv(expression(sum(x)), "x")
>>
>>
>
> does not make any sense.
>
>
Good point. But this does:

deriv(expression(sum(log(a*x))), "a")

where a is a scalar.

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