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- W2000492500 abstract "Abstract Because they require very little storage and can be computationally quite efficient, gradient algorithms are attractive methods for fitting large nonorthogonal analysis of variance (ANOVA) models. A coordinate-free approach is used to provide very simple definitions for a number of well-known gradient algorithms and insights into their similarities and differences. The key to finding a good algorithm is finding an algorithm metric that leads to easily computed gradients and that is as close as possible to the metric defined by the ANOVA problem. This leads to the proposal of a new class of algorithms based on a proportional subclass metric. Several new theoretical results on convergence are derived, and some empirical comparisons are made. A similar, but much briefer, treatment of analysis of covariance is given. On theoretical convergence of the methods it is shown, for example, that the Golub and Nash (1982) algorithm requires at most d + 1 iterations if all but d of the cells in the model have..." @default.
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- W2000492500 date "1988-06-01" @default.
- W2000492500 modified "2023-09-24" @default.
- W2000492500 title "Nonorthogonal Analysis of Variance Using Gradient Methods" @default.
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- W2000492500 doi "https://doi.org/10.1080/01621459.1988.10478621" @default.
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