Reduced .txt file (701 by 38) after deleting redundant variables x8, x19, x20, x21, x22, x25, x26, x28, x29, x32, and x47. There are strong correlations among the 37 remaining variables---the condition number on the 701 by 37 X matrix is 178.4.

There are 48 original independent variables (0-1 from markers) and Y, a wing shape index, from 701 recombinant isogenic lines related to chromosome 2 of the common fruit fly. The data are from Weber, K., R. Eisman, S. Higgins, L. Morey, A. Patty, M. Tausek and Z.-B. Zeng (2001), "An Analysis of Polygenes Affecting Wing Shape on Chromosome 2 in Drosophila Melanogaster," Genetics, 159, 1045-1057. The 48 variables (0-1) are related to markers as follows:

ID Marker cM
x1  22A2  2.2
x2  22B2  2.4
x3  23B1  6.6
x4  23C3  7.5
x5  24C1 10.3
x6  24D4 11.2
x7  24E5 12.0
x8  25A1 13.0
x9  25A3 13.5
x10 27B1 19.8
x11 29F1 30.4
x12 32C1 42.9
x13 33A1 44.3
x14 34A5 46.2
x15 34B2 46.5
x16 35B6 50.4
x17 37B8 53.7
x18 37D1 53.9
x19 38B1 54.4
x20 38D1 54.6
x21 38E1 54.7
x22 39E1 54.9
x23 41D1 55.5
x24 42B1 55.6
x25 42B2 55.7
x26 42C1 55.8
x27 42C3 55.9
x28 43A1 56.4
x29 43B3 56.5
x30 44F1 58.3
x31 46C1 59.7
x32 46C6 59.8
x33 46F1 60.0
x34 47B4 60.3
x35 47D1 60.9
x36 48D1 62.5
x37 49E4 66.7
x38 50D1 70.8
x39 51D6 73.5
x40 52A1 74.6
x41 55C4 83.8
x42 56B7 87.5
x43 56F3 90.0
x44 57E6 98.1
x45 58D1 99.2
x46 59A1 101.7
x47 59B8 102.3
x48 60F1 108.1