Uncertainty evaluation in multivariate analysis : A test case study

• We have used different multivariate analysis methods to estimate quantities in the fields of food control and atmospheric remote sensing. In order to estimate the uncertainties in these estimates we studied analytical as well as non-parametric numerical methods. The methods have been evaluated by comparison between obtained results and independent sets of measurements. We present one test case from each field, including results, where these methods have been applied. For the food control test case reduced chi-squared (? ?2) of approximately unity indicate that both the analytical and numerical methods used for uncertainty estimation produce uncertainties of reasonable size. In the atmospheric remote sensing test case, a ??2 = 46 indicated that the uncertainties from the numerical method were far too small, whereas a ??2 = 1.5 indicate that the size of the analytically determined uncertainties can represent the size of the "true" errors. © Springer 2005.

Subject headings

LANTBRUKSVETENSKAPER  -- Lantbruksvetenskap, skogsbruk och fiske -- Livsmedelsvetenskap (hsv//swe)

AGRICULTURAL SCIENCES  -- Agriculture, Forestry and Fisheries -- Food Science (hsv//eng)

Keyword

Food Engineering

Livsmedelsteknik

Publication and Content Type

ref (subject category)

art (subject category)