POLYc is a User RPL program which extracts the coefficients (real or complex) of a symbolic polynomial as a vector compatible with PEVAL and PROOT. Program POLYr returns the coefficients of the numerator and denominator of a rational polynomial. Seven other utility programs are provided to return the coefficients of special polynomials returned by built-in functions such as LAGRANGE, LEGENDRE, and others. All programs implement some input argument validation and error handling.

POLYc and the other programs are intended to be used in Numeric Approx mode, not Exact mode. The programs manipulate the CAS flags and modes to prevent CAS prompts and warnings while the programs execute.

Program files have the file suffix .hp. These are tri-graph text files which can be downloaded to the calculator. Complete documentation with annotated source code is included with the file PCOEF.PDF. The LaTeX source files are available on request from the email address below.

I would very much appreciate bug reports, documentation corrections, and any other suggestions, which can be sent to daburkett3141@gmail.com.