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Can we use the regression coefficient profile for selecting PLS components? |
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Written by Johan Trygg
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The linear model y=Xb + f is often used in chemometrics. Unfortunately, we have put too much emphasis on the importance of the regression coefficient profile b, and mistakenly assumed or believed that it should be a good estimate of the "pure profile". This is not true, and I will argue why in later editorials. But this time, I want to address an earlier question that was posed in relation to the regression coefficient profile.
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Editorials at Chemometrics.se |
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Written by Johan Trygg
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Welcome to the new Editorial section at Chemometrics.se. In the past, the Tutorial and Editorial sections were merged. Now, these have been separated. |
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Svante Wold's New Year Editorial 2005 |
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Written by Svante Wold, Umetrics & Umea University
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Another year has passed too quickly, and we now read January 2005 on our calendars. In 2004, good things happened and terrible, happy and sad, as usual. However, chemometrics does well, spreading deeper into biology where the data sets are larger than ever with thousands of variables in, among others, gene arrays, LC-MS profiles, and NIR and IR microscopy. |
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Svante Wold's New Year Editorial 2004 |
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Written by Svante Wold, Umetrics & Umea University
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The year 2003 has passed amazingly fast - I feel it was yesterday that I was struggling with last years New Year editorial. But actually the world has moved one year forward, and we now write January 2004. Chemometrics has had another good year with exciting and enjoyable conferences at, among others, Åland and Lisbon, displaying improved methodology, and interesting applications. |
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Editorial