![]() When you are done, press the Close button. To change from least squares to a robust fitting method, use the Method menu. To change the type of confidence intervals, use the Bounds menu. To change the degree of the polynomial, choose from the pop-up menu at the top of the figure. The argument n controls the degree of the polynomial fit. The predicted value of y will update as you drag the reference line. The shape of the pointer changes from an arrow to a cross hair when you are over the vertical line to indicate that the line can be dragged. A polynomialRegressor object encapsulates a set of polynomial regressors. For example, y ( t 1) 2 and y ( t 1) u ( t 1) are both polynomial regressors with orders of 2 and variable delays of one sample. Polytool fits by least-squares using the regression modelĮvaluate the function by typing a value in the x-axis edit box or by dragging the vertical reference line on the plot. Polynomial regressors are polynomials that are composed of delayed input and output variables. Plots 100(1-alpha) % confidence intervals on the predicted values. Text with current predicted value of y and its uncertainty appears to the left of the y-axis. The plot shows the fitted curve and 95% global confidence intervals on a new predicted value for the curve. This plot is graphic user interface for exploring the effects of changing the polynomial degree of the fit. ![]() ![]() now be used to predict y -values for any. Interactive plot for prediction of fitted polynomialsįits a line to the column vectors x and y and displays an interactive plot of the result. The coeffi cients p(x) and the equation obtained by linear regression can. If a Matlab function is missing from the list and does not appear on the current release of the package, confirm. this entire section is about the current development version. Bugs are not listed here, search and report them on the bug tracker instead. Polytool (Statistics Toolbox) Statistics Toolbox Follows an incomplete list of stuff missing in the statistics package to be matlab compatible.
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