Gabor Grothendieck wrote:
> If they are on Windows installing Yacas is just a matter
> of issuing a single R command with no arguments.
> yacas grabs it from the net and installs it automaticaly
> without any further user interaction. It also reminds you
> to give the command and tells you exactly
You could see if Ryacas package can do what you want:
http://ryacas.googlecode.com
2008/8/14 Ben Bolker <[EMAIL PROTECTED]>:
> Prof Brian Ripley wrote:
>> The derivative of plogis is surely dlogis. (And yes, there is a good
>> reason why we have such a function: take a look at its C code.)
>
>
Prof Brian Ripley wrote:
> The derivative of plogis is surely dlogis. (And yes, there is a good
> reason why we have such a function: take a look at its C code.)
Doh.
>
> That means we would need an entry for dlogis too, I guess. I am not
> convinced that there is a real need for these (and wh
The derivative of plogis is surely dlogis. (And yes, there is a good
reason why we have such a function: take a look at its C code.)
That means we would need an entry for dlogis too, I guess. I am not
convinced that there is a real need for these (and where does this stop?)
What would be much
Its a valid R function. ?"{"
On Thu, Aug 14, 2008 at 1:07 PM, Ben Bolker <[EMAIL PROTECTED]> wrote:
> http://www.zoology.ufl.edu/bolker/deriv_patch2.txt
>
> has this change added as well.
> However, I'm not as confident that this is the right thing
> to do? Should curly brackets even be appe
http://www.zoology.ufl.edu/bolker/deriv_patch2.txt
has this change added as well.
However, I'm not as confident that this is the right thing
to do? Should curly brackets even be appearing in mathematical
expressions?
Ben
Gabor Grothendieck wrote:
> While you are at it could you add { to th
While you are at it could you add { to the
table so that this works:
> # this is ok
> f <- function(x) x*x
> D(body(f), "x")
x + x
> # but not g which is same as f
> # except it has { ... } surrounding its body
> g <- function(x) { x*x }
> D(body(g), "x")
Error in D(body(g), "x") : Function '`{`'