# Least squares tutorial

The "R Square" column represents the R 2 value (also called the coefficient of determination), which is the proportion of variance in the dependent variable that can be explained by the independent variables (technically, it is the proportion of variation accounted for by the regression model above and beyond the mean model). The + symbol behaves roughly the same as the *, except that it requires at least one character to match. For example, [a-c]+ would match a, abc, or aabcabc, but not an empty string. Regular expression parsing is more powerful than globbing. With globbing you can use square brackets to enclose a set of characters any of which will be a match. Feb 17, 2014 · Biology Chemistry Partial Least Squares (O-/PLS/-DA) Informatics Partial Least Squares Modeling Discriminant Analysis (PLS-DA) Steps 1.Calculate a single Y PLS model to discriminate between extraction/treatment 2.Select optimal scaling and model latent variable (LV) number 3.Overview PLS scores and loadings plots 4.Validate model 5.Repeat steps 1-4 for an O-PLS model Visualize: 1.Sample scores annotated by extraction and treatment 2.Variable loadings plot Exercise: 1.How are scores different ... Nov 13, 2019 · Learn from thousands of free Tutorials Join the Community [VIDEO] Matlab Tutorial: Fitting with Least Squares (LSE), Least absolute residuals (LAR) and Bisquare weights (BSW)