Texas Instruments voyage 200 User Manual - Page 547
TwoVar, PowerReg, QuadReg, SinReg, Calc Type, Description
UPC - 033317193424
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Calc Type PowerReg QuadReg QuartReg SinReg Description Power regression - Fits the data to the model equation y=axb using a least-squares fit and transformed values ln(x) and ln(y). Quadratic regression - Fits the data to the second-order polynomial y=ax2+bx+c. You must have at least three data points. • For three points, the equation is a polynomial fit. • For four or more points, it is a polynomial regression. Quartic regression - Fits the data to the fourth-order polynomial y=ax4+bx3+cx2+ dx+e. You must have at least five data points. • For five points, the equation is a polynomial fit. • For six or more points, it is a polynomial regression. Sinusoidal regression - Calculates the sinusoidal regression and updates all the system statistics variables. The output is always in radians, regardless of the angle mode setting. Note: For TwoVar and all regression calculations, the columns that you specify for x and y (and optionally, Freq or Category) must have the same length. From the Home Screen or a Program Use the applicable command for the calculation that you want to perform. The commands have the same name as the corresponding Calculation Type. Refer to the Technical Reference module for information about each command. Statistics and Data Plots 547