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R

R interface for Chicken Scheme

Overview

R provides a simple way to call R-functions, consisting of the following two forms: R and R*. R evaluates an R-expression, returning an opaque R-pointer that can be passed to other R-functions. Use this, for instance, when you don't need to modify the object in Scheme.

R*, on the other hand, evaluates the expression and tries to translate it into Scheme; it understands NULL, lists, strings, reals, bools, complex numbers and symbols. Everything else is opaque.

Documentation

R

[syntax] (R expression) → R-object

Evaluate an R-expression; for instance, (R (rnorm 2)) => #<tagged pointer sexp 1f40818>.

expression

The expression to evaluate

(define-syntax
  R
  (lambda (expression rename compare)
    (list 'apply 'R-eval (list 'quasiquote (cdr expression)))))

R*

[syntax] (R* expression) → Scheme-object

Evaluate an R-expression and translate it into Scheme; for instance, (R* (rnorm 2)) => #(-0.0740060993626383 -1.77269881184448).

expression

The expression to evaluate

(define-syntax
  R*
  (lambda (expression rename compare) `(R->scheme (R ,@(cdr expression)))))

About this egg

Author

Peter Danenberg

Colophon

Documented by cock.