Texas Instruments TINSPIRE Reference Guide - Page 57
libShortcut, Catalog >, LinRegBx, Output variable, Description, CopyVar, DelVar
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libShortcut( ) Catalog > libShortcut(LibNameString, ShortcutNameString [, LibPrivFlag]) ⇒ list of variables Creates a variable group in the current problem that contains references to all the objects in the specified library document libNameString. Also adds the group members to the Variables menu. You can then refer to each object using its ShortcutNameString. This example assumes a properly stored and refreshed library document named linalg2 that contains objects defined as clearmat, gauss1, and gauss2. Set LibPrivFlag=0 to exclude private library objects (default) Set LibPrivFlag=1 to include private library objects To copy a variable group, see CopyVar on page 18. To delete a variable group, see DelVar on page 29. LinRegBx LinRegBx X,Y[,[Freq][,Category,Include]] Computes the linear regression y = a+b·x on lists X and Y with frequency Freq. A summary of results is stored in the stat.results variable. (See page 97.) All the lists must have equal dimension except for Include. X and Y are lists of independent and dependent variables. Freq is an optional list of frequency values. Each element in Freq specifies the frequency of occurrence for each corresponding X and Y data point. The default value is 1. All elements must be integers | 0. Category is a list of numeric or string category codes for the corresponding X and Y data. Include is a list of one or more of the category codes. Only those data items whose category code is included in this list are included in the calculation. For information on the effect of empty elements in a list, see "Empty (void) elements" on page 131. Catalog > Output variable stat.RegEqn stat.a, stat.b stat.r2 stat.r stat.Resid stat.XReg stat.YReg stat.FreqReg Description Regression Equation: a+b·x Regression coefficients Coefficient of determination Correlation coefficient Residuals from the regression List of data points in the modified X List actually used in the regression based on restrictions of Freq, Category List, and Include Categories List of data points in the modified Y List actually used in the regression based on restrictions of Freq, Category List, and Include Categories List of frequencies corresponding to stat.XReg and stat.YReg TI-Nspire™ Reference Guide 51