The impedence mismatch is strong with this one: R is a paleo-pseudo-Scheme[fn:1][fn:2][fn:3] for running statistics; and Chicken is a neo-etymo-Scheme for general computing.
Thank the Olympians, however, that the Scheme-R dichotomy is no longer: we can have our cake.
Oh; and eat it, too.
[fn:1] Ross Ihaka and Robert Gentleman, ”R: A language for data analysis and graphics,” Journal of Computational and Graphical Statistics, Vol. 5, No. 3. (1996), pp. 299-314, doi:10.2307/1390807.
[fn:2] Ed Kademan, “Scheme in R,” http://tolstoy.newcastle.edu.au/R/help/01c/3193.html.
[fn:3] Stavros Macrakis, “R and Scheme,” https://stat.ethz.ch/pipermail/r-help/2008-December/181980.html.