Projection matrix (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Projection matrix" in English language version.

Last modified: 20:41:15, 13 March 2026 (UTC)

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archive.org (Global: 6^th place; English: 6^th place)

Gans, P. (1992). Data Fitting in the Chemical Sciences. Wiley. ISBN 0-471-93412-7.
Amemiya, Takeshi (1985). Advanced Econometrics. Cambridge: Harvard University Press. pp. 460–461. ISBN 0-674-00560-0.
Rao, C. Radhakrishna; Toutenburg, Helge; Shalabh; Heumann, Christian (2008). Linear Models and Generalizations (3rd ed.). Berlin: Springer. p. 323. ISBN 978-3-540-74226-5.

books.google.com (Global: 3^rd place; English: 3^rd place)

Basilevsky, Alexander (2005). Applied Matrix Algebra in the Statistical Sciences. Dover. pp. 160–176. ISBN 0-486-44538-0.

doi.org (Global: 2^nd place; English: 2^nd place)

Hoaglin, David C.; Welsch, Roy E. (February 1978). "The Hat Matrix in Regression and ANOVA" (PDF). The American Statistician. 32 (1): 17–22. doi:10.2307/2683469. hdl:1721.1/1920. JSTOR 2683469.

ecmwf.int (Global: low place; English: low place)

old.ecmwf.int

"Data Assimilation: Observation influence diagnostic of a data assimilation system" (PDF). Archived from the original (PDF) on 2014-09-03.

hdl.handle.net (Global: 66^th place; English: 34^th place)

Hoaglin, David C.; Welsch, Roy E. (February 1978). "The Hat Matrix in Regression and ANOVA" (PDF). The American Statistician. 32 (1): 17–22. doi:10.2307/2683469. hdl:1721.1/1920. JSTOR 2683469.

jstor.org (Global: 23^rd place; English: 15^th place)

Hoaglin, David C.; Welsch, Roy E. (February 1978). "The Hat Matrix in Regression and ANOVA" (PDF). The American Statistician. 32 (1): 17–22. doi:10.2307/2683469. hdl:1721.1/1920. JSTOR 2683469.

mit.edu (Global: 476^th place; English: 340^th place)

dspace.mit.edu

Hoaglin, David C.; Welsch, Roy E. (February 1978). "The Hat Matrix in Regression and ANOVA" (PDF). The American Statistician. 32 (1): 17–22. doi:10.2307/2683469. hdl:1721.1/1920. JSTOR 2683469.

stackexchange.com (Global: 4,114^th place; English: 3,027^th place)

math.stackexchange.com

"Proof that trace of 'hat' matrix in linear regression is rank of X". Stack Exchange. April 13, 2017.

web.archive.org (Global: 1^st place; English: 1^st place)

"Data Assimilation: Observation influence diagnostic of a data assimilation system" (PDF). Archived from the original (PDF) on 2014-09-03.