Dear everyone,
the following is obviously used to compute the nth derivative, which seems
to work
(deriv(sqrt(1 - x^2),x,n))
However, before using this, I wanted to make sure it does what I think it
does
but can't figure it out when reading the ?deriv info or any other
documentation on deriv for
See in-line below.
On 03-Jan-2012 alexander16 wrote:
Dear everyone,
the following is obviously used to compute the nth derivative,
which seems to work
(deriv(sqrt(1 - x^2),x,n))
Well, it doesn't seem to work for me! In fact:
n - 2
(deriv(sqrt(1 - x^2),x,n))
# Error in deriv(sqrt(1 -
I suggest you look at the help pages for expression and evel, then
consider the following example in addition to the function DD in the
examples for deriv:
Dxy - deriv( ~x*y*z, c('x', 'y'))
x - 2; y - 3; z - 4
eval(Dxy)
Dxy.fn - deriv(expression(x*y*z), c('x', 'y'), TRUE)
Dxy.fn
Dxy.fn(x, y)
Dear Spencer, Dear Ted,
thanks for your quick and detailled answers.
I should have indicated that I use the Ryacas package - for example:
library(Ryacas)
x - Sym(x)
Simplify(deriv(x^3),x,2))
Just now I have realized that the deriv function is translated
to the Deriv function in yacas, which
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