In a different perspective the sage project might also be an option,
it seems to interface to Maxima and R among other things. I haven't
tested it myself though.
http://www.sagemath.org/index.html
Best wishes,
baptiste
PS: sagemath.org is a well-thought website, perhaps a good
Yacas was completely rewritten in java (Ryacas interfaces to the
C version) since the Ryacas project started so I would not exactly
characterize yacas as dead. The work that is going on in yacas
may not have high visibility but that does not mean there is none.
Also while Maxima is more
My main problem is that yacas can only factorize polynomials in one
variable.
Any CAS which is not able to factor a^2 - b^2 into (a+b)*(a-B)
for me is less than satisfactory.
On Feb 10, 2009, at 1:51 PM, Gabor Grothendieck wrote:
Yacas was completely rewritten in java (Ryacas interfaces to
Gabor Grothendieck ggrothendieck at gmail.com writes:
Yacas was completely rewritten in java (Ryacas interfaces to the
C version) since the Ryacas project started so I would not exactly
characterize yacas as dead. The work that is going on in yacas
may not have high visibility but that
On Tue, Feb 10, 2009 at 7:51 AM, Gabor Grothendieck
ggrothendi...@gmail.com wrote:
...Also while Maxima is more sophisticated in terms of algorithms,
Glad to hear it... (I first worked on Maxima in 1971...)
yacas is actually more sophisticated from the viewpoint of its language which
borrows
I am not sure what the point of all this is.
This is an R list, not a CAS list. The recommendation to use yacas is based on
the fact that there is an interface between R and yacas. There is no
interface between
R and Maxima so Maxima is not in the running. Anyone who has used
Maxima knows
Gabor Grothendieck ggrothendieck at gmail.com writes:
I am not sure what the point of all this is.
The point of all this is:
1. Some users of R here on the list apparently would like to have more powerful
CAS functionalities than Yacas can provide.
2. Many of the solution hints to Ryacas
, 2009 3:12 PM
To: r-help@r-project.org
Subject: [R] general inverse solver?
Just wondering if there's an R package which does tricks
similar to what TK!Solver does.
TK!Solver, for those not lucky enough to have found it,
basically allows one to define a bunch of equations, assign
Gabor G a ecrit:
Check out the Ryacas package. There is a vignette with some
examples.
Which led me to the manuals for yacas itself. I'm guessing there may be
a way to use yacas' AND construct to combine a few equations and then
hope the Newton Solver can work with that, but it's not
The forms of equations are limited but its not limited to just one:
library(Ryacas)
Loading required package: XML
x - Sym(x)
y - Sym(y)
Solve(List(x+y == 2, x-y == 0), List(x, y))
[1] Starting Yacas!
expression(list(list(x == 2 - y, y == 1)))
On Mon, Feb 9, 2009 at 7:45 PM, Carl Witthoft
I know that Ryacas is promoted here whenever requests about symbolic algebra
or calculus appear on the R-help list. But to say the truth, Yacas itself is
a very very limited Computer Algebra System and looking onto its home page
it appears the development will stop or has stopped anyway.
It
Just wondering if there's an R package which does tricks similar to what
TK!Solver does.
TK!Solver, for those not lucky enough to have found it, basically allows
one to define a bunch of equations, assign values to an arbitrary subset
of the variables, from which it calculates (either
Check out the Ryacas package. There is a vignette with some
examples.
On Sun, Feb 8, 2009 at 3:11 PM, Carl Witthoft c...@witthoft.com wrote:
Just wondering if there's an R package which does tricks similar to what
TK!Solver does.
TK!Solver, for those not lucky enough to have found it,
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