Barrodale, I2020-01-232020-01-2320202020-01-23http://hdl.handle.net/1828/11501In 1971 Frank D.K. Roberts and I developed the BR algorithm ([i],[ii]), complete with Fortran code [iii], for calculating L1 solutions to overdetermined systems of m linear equations in n unknown parameters2. The challenge here is to develop fast code for L1 fitting by straight lines (n = 2) to big data sets (m ≥ 106) that largely avoids the frustration of sluggish run times.enArticleDepartment of Computer Science