WIREs Computational Statistics Principal component analysis 001x5so n 00 9 F 8 的 8o感HA品号8A6品8 的 a a 9寸 品 9 r 8 H 骂 后 三 号 层 男 曾 日 曾 子 足 的 三 5 5 厨 子 S 69.52 S 常 哥 51:50 73.Lt 788 65:gs 65:0E 65.2z 17.10 2 N n m m N e 邑 N m n 文 e 邑 思 P5.0- 21 器 层 S g 69- 20.2 0~- 的 芦 点 25.2 宫 翠 葛 用 66:h 60.0 两 25- 255 学 居 一 T m 7 m Y 三 其 n e 9 2 o 邑 N n m e & 层 5 aupunos 妻 snoijuajald 爱 呈 点 嘉 小 Volume 2,July/August 2010 2010 John Wiley Sons,Inc. 435WIREs Computational Statistics Principal component analysis TABLE 1 Raw Scores, Deviations from the Mean, Coordinates, Squared Coordinates on the Components, Contributions of the Observations to the Components, Squared Distances to the Center of Gravity, and Squared Cosines of the Observations for the Example Length of Words ( Y) and Number of Lines ( W) Y W y w F1 F2 ctr1 × 100 ctr2 × 100 F2 1 F2 2 d2 cos2 1 × 100 cos2 2 × 100 Bag 3 14 −366.67 0.69 11 1 44.52 0.48 45 99 1 Across 6 70 −1 −0.84 −0.54 0 1 0.71 0.29 1 71 29 On 2 11 −434.68 −1.76 6 6 21.89 3.11 25 88 12 Insane 6 9010.84 0.54 0 1 0.71 0.29 1 71 29 By 2 9 −412.99 −2.84 2 15 8.95 8.05 17 53 47 Monastery 9 43 − 4 − 4.99 0.38 6 0 24.85 0.15 25 99 1 Relief 6 8000.00 0.00 0 0 0 0.00 0 0 0 Slope 5 11 −133.07 0.77 3 1 9.41 0.59 10 94 6 Scoundrel 9 53 −3 − 4.14 0.92 5 2 17.15 0.85 18 95 5 With 4 8 −201.07 −1.69 0 5 1.15 2.85 4 29 71 Neither 7 21 −6 −5.60 −2.38 8 11 31.35 5.65 37 85 15 Pretentious 11 4 5 − 4 −6.06 2.07 9 8 36.71 4.29 41 90 10 Solid 5 12 −143.91 1.30 4 3 15.30 1.70 17 90 10 This 4 9 −211.92 −1.15 1 3 3.68 1.32 5 74 26 For 3 8 −301.61 −2.53 1 12 2.59 6.41 9 29 71 Therefore 9 13 −7 −7.52 −1.23 14 3 56.49 1.51 58 97 3 Generality 10 4 4 − 4 −5.52 1.23 8 3 30.49 1.51 32 95 5 Arise 5 13 −154.76 1.84 6 7 22.61 3.39 26 87 13 Blot 4 15 −276.98 2.07 12 8 48.71 4.29 53 92 8 Infectious 10 6 4 −2 −3.83 2.30 4 10 14.71 5.29 20 74 26 & 120 160 0 0 0 0 100 100 392 52 444 λ1 λ2 I M W = 8, MY = 6. The following abbreviations are used to label the columns: w = (W − M W); y = (Y − MY). The contributions and the squared cosines are multiplied by 100 for ease of reading. The positive important contributions are italicized , and the negative important contributions are represented in bold. Volume 2, July/August 2010  2010 John Wiley & Son s, In c. 435