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...astronomer, and so apologies in advance to those people for the nature of this email. I need to convert right-ascension and declination (RA & DEC) coordinates for an object on the sky into physical pixel positions in a FITS image in R. There is a C library that does this, WCSLIB by Mark Calabretta (http://www.atnf.csiro.au/people/mcalabre/WCS/), however I am unsure how to use it in R. I do not program in C, which adds to the problem. I have created the libwcs.so file and moved it to /usr/local/lib already, and am able to load the library in R using: > dyn.load("/usr/local/lib...