| 单词 | principal component |
| 释义 | > as lemmasprincipal component principal component n. Statistics the linear combination of the components of a set of data (regarded as points in a multidimensional space) which contributes most strongly to the variance of the set; frequently attributive (in singular or plural), designating a method of analysis which involves finding the principal component and removing the variance due to it, and repeating this operation successively. ΘΚΠ the world > relative properties > number > probability or statistics > [noun] > distribution > variability or spread > measures of > relating to variance heteroscedasticity1905 homoscedasticity1905 covariance1931 communality1933 principal component1933 1933 H. Hotelling in Jrnl. Educ. Psychol. 34 421 We..determine the components, not exceeding n in number, and perhaps neglecting those whose contributions to the total variance are small. This we shall call the method of principal components. 1963 R. R. Sokal & P. H. A. Sneath Numerical Taxon. vii. 195 Two different methods of factor analysis are customarily practiced: the principal components method is largely employed by British factor analysts. 1994 Observatory 114 98 Stephen Fossey..described the use of Principal Component Analysis as a technique for describing the relationships between variables in a sample of multivariate data. < as lemmas |
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