Casio FX-CG20, Руководство пользователя

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Regression
With the given or calculated data, it is possible to create the
Regression and determine the function terms.
Note (Feature) 0.5 1 1.5 2
Number (Expression) 1,58 3,26 4,84 6,38
Regression
Data is given in the list. It is useful, for graphically representing
the data of the regression, e.g. a Scatter graph (vgl. Graphical
representation in the Statistics application S.30)
With CALC
[F1]
the Regression type can be selected. For this
example, the linear regression is selected with
[F1] (x)
Note: From the List editor, one can be directed to the Settings window
for regression with [F2] (CALC) (without graphical representation!)
Under SET (
[F6] ) some settings are made:
1Var xlist / 2Var xlist: x-value of a one or two dimensional
sample.
1Var Freq / 2Var Freq: Frequency values of a one- or data pairs
of a two dimensional sample.
2Var Ylist: Frequency values of a two dimentional sample.
The entries are confirmed with
[EXE]
With REG ([F3]) the different regression types can be changed.
Saving the Term
The result can be saved in one of the 20 function memories with
[F5] (COPY), so that it can be used in other applications (Graphic,
RUN-MAT, etc). Select a free space and confirm with
[EXE]
Graphing the Regression
The regression is shown graphically with [F6] (DRAW)
Regression
• Regression types: x (Linear), x^2 (Quadratic),
Exp (Exponential), etc.
• Save the Regression function.