Sym
The Symbol interface to yacas.
Sym(...) Expr(x)
... |
An R character string or object that can be coerced to a character string. |
x |
An R expression. |
An object of class "Sym" is internally a yacas character string. An
object of class "Expr" is internally an R expression. One can combine
such objects using the Math and Ops R operators (see help(Math) and
help(Ops) for a list). Also there are methods for a number of R generics:
as.character.Sym, as.expression.Sym, determinant.Sym,
deriv.Sym and print.Sym and yacas-oriented functions: Clear,
Conjugate, Expand, Factor, Factorial, I, Identity, Infinity, Integrate,
Inverse, InverseTaylor, Limit, List, N, Newton, Pi, Precision, PrettyForm,
PrettyPrinter, Set, Simplify, Solve, Subst, Taylor, TeXForm, Transpose,
Ver and "%Where%" all of which have the same meaning as the corresponding yacas
commands. Try vignette("Rycas-Sym") for many examples.
Get Sym objects with getSyms().
Sym returns a "Sym" object and Expr returns an
"Expr" object.
Currently the only Expr methods implemented are
as.character.Expr, deriv.Expr, Math.Expr, Ops.Expr and print.Expr.
x <- Sym("x")
x*x
Integrate(x*x, x)
Sym("%") %Where% list(x = 10)
acos(Sym("1/2"))
y <- Exprq(x)
y*y
deriv(y*y, y)
Exprq(acos(1/2))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.