README

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caracas: Computer algebra in R

Installation

if (!caracas::has_sympy()) {
  caracas::install_sympy() 
}

To build and install from Github with vignettes run this command from within R (please install remotes first if not already installed):

Configuring the Python environment

The caracas package uses the reticulate package (to run Python code). Thus, if you wish to configure your Python environment, you need to 1) load reticulate, 2) configure the Python environment, and 3) load caracas. The Python environment can be configured as described here. Again, this need to be done before loading caracas.

Development site

Online documentation

Origin of name

The name “caracas” is intended to mean “(inter)face to computer algebra system(s)” - notice that “cara” is Spanish (Castellano to be precise) for “face”.

Code of conduct

Please note that the caracas project is released with a Contributor Code of Conduct (available in CODE_OF_CONDUCT.md). By contributing to this project, you agree to abide by its terms.

Brief introduction

library(caracas)
# options(caracas.print.prettyascii = TRUE)

x <- symbol('x')
eq <- 2*x^2 - x
eq
#> c:    2    
#>    2⋅x  - x
as.character(eq)
#> [1] "2*x^2 - x"
as_expr(eq)
#> expression(2 * x^2 - x)
tex(eq)
#> [1] "2 x^{2} - x"

solve_sys(eq, x)
#> x = 0
#> x = 1/2
der(eq, x)
#> c: 4⋅x - 1
subs(eq, x, "y")
#> c:    2    
#>    2⋅y  - y

A <- matrix(c("x", 2, 0, "2*x"), 2, 2)
B <- as_sym(A)
B
#> c: ⎡x   0 ⎤
#>    ⎢      ⎥
#>    ⎣2  2⋅x⎦
Binv <- inv(B)
Binv
#> c: ⎡ 1      ⎤
#>    ⎢ ─    0 ⎥
#>    ⎢ x      ⎥
#>    ⎢        ⎥
#>    ⎢-1    1 ⎥
#>    ⎢───  ───⎥
#>    ⎢  2  2⋅x⎥
#>    ⎣ x      ⎦
tex(Binv)
#> [1] "\\left[\\begin{matrix}\\frac{1}{x} & 0\\\\- \\frac{1}{x^{2}} & \\frac{1}{2 x}\\end{matrix}\\right]"

eigenval(Binv)
#> [[1]]
#> [[1]]$eigval
#> c: 1
#>    ─
#>    x
#> 
#> [[1]]$eigmult
#> [1] 1
#> 
#> 
#> [[2]]
#> [[2]]$eigval
#> c:  1 
#>    ───
#>    2⋅x
#> 
#> [[2]]$eigmult
#> [1] 1

Contribute, issues, and support

Please use the issue tracker at https://github.com/r-cas/caracas/issues if you want to notify us of an issue or need support. If you want to contribute, please either create an issue or make a pull request.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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caracas: Computer algebra in R