Issue No. 07 - July (1968 vol. 17)
E.J. Copes , Martin Marietta Corporation
This paper deals with the problem of selecting the best approximation to an arbitrary function, using a given number of straight line segments to form the approximation. This is, of course, the basic problem of programming functions for generation by analog function generators. The author has formalized a noteworthy technique for optimal selection of breakpoints, and coupled his technique with a slope-selecting procedure based on least-squares optimization.
E.J. Copes, "R68-35 Optimal Generation of Arbitrary Functions", IEEE Transactions on Computers, vol. 17, no. , pp. 719-720, July 1968, doi:10.1109/TC.1968.229123