Example: | Linearize the following expression: |
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| x | y | 4 |
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Command: | LIN(X*(EXP(X)*EXP(Y))^4) |
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Result: | X*EXP(4X+4Y) |
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See also: | TEXPAND |
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LINE | Command Operation |
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Description: | Draw Line Command: Draws a line in PICT between the input coordinates. | ||||||||
Access: | !°LPICT LINE |
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Input/Output: |
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| Level 2/Argument 1 | Level 1/Argument 2 |
| Level 1/Item 1 | ||
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| (x1, y1) | (x2, y2) | → |
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| { #n1, #m1} | { #n2, #m2} | → |
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Example: | This program: |
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| « (0,0) (2,3) LINE { # 0d # 0d } PVIEW 7 FREEZE » | ||||||||
| draws a line in PICT between two | ||||||||
| 0d # 0d } at the upper left corner of the picture display, and freezes the display. | ||||||||
See also: | ARC, BOX, TLINE |
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ΣLINE | Command |
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Description: | Regression Model Formula Command: Returns an expression representing the best fit line | ||||||||
| according to the current statistical model, using X as the independent variable name, and explicit | ||||||||
| values of the slope and intercept taken from the reserved variable ΣPAR. | ||||||||
| For each curve fitting model, the following table indicates the form of the expression returned by | ||||||||
| ΣLINE, where m is the slope, x is the independent variable, and b is the intercept. | ||||||||
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| Model |
| Form of Expression |
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| LINFIT |
| mx + b |
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| LOGFIT |
| m ln(x) + b |
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| EXPFIT |
| bemx |
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| PWRFIT |
| bxm |
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Access: | …µ ΣLINE |
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Input/Output: |
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| Level 1/Argument 1 |
| Level 1/Item 1 | ||
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Example: | model is EXPFIT, and if the slope is 5 and the intercept 3, ΣLINE returns | ||||||||
| '3*EXP(5*X)'. |
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See also: | BESTFIT, COLΣ, CORR, COV, EXPFIT, LINFIT, LOGFIT, LR, PREDX, PREDY, PWRFIT, | ||||||||
| XCOL, YCOL |
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LINFIT | Command |
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Type: |
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Description: | Linear Curve Fit Command: Stores LINFIT as the fifth parameter in the reserved variable ΣPAR, | ||||||||
| indicating that subsequent executions of LR are to use the linear curve fitting model. | ||||||||
| LINFIT is the default specification in ΣPAR. |
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Access: | …µLINFIT |
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