This is dataplot data file WAMPLER1.DAT Roy Wampler (NIST) Least Squares Algorithm Test Data (Polynomial) Note--The test consists of: Fitting a 5th degree polynomial of Y1 on X Fitting a 5th degree polynomial of Y2 on X Note--The exact coefficients for the fit of Y1 on X are 1, 1, 1, 1, 1, 1. The exact coefficients for the fit of Y2 on X are 1, .1, .01, .001, .0001, .00001 Source--Wampler, Roy H. (1970). "A Report of the Accuracy of Some Widely-Used Least Squares Computer Programs". Journal of the American Statistical Association, 1970, Vol. 65, Pages 549-565, especially p. 552. To read this file into Dataplot (& do fits)-- SKIP 25 READ WAMPLER1.DAT X Y1 Y2 QUINTIC FIT Y1 X QUINTIC FIT Y2 X X Y1 Y2 -------------------------- 0 1 1.00000 1 6 1.11111 2 63 1.24992 3 364 1.42753 4 1365 1.65984 5 3906 1.96875 6 9331 2.38336 7 19608 2.94117 8 37449 3.68928 9 66430 4.68559 10 111111 6.00000 11 177156 7.71561 12 271453 9.92992 13 402234 12.75603 14 579195 16.32384 15 813616 20.78125 16 1118481 26.29536 17 1508598 33.05367 18 2000719 41.26528 19 2613660 51.16209 20 3368421 63.00000