Example:

Linearize the following expression:

 

 

 

x

y

4

 

 

 

 

 

 

 

x(e

e )

 

 

 

 

 

 

 

Command:

LIN(X*(EXP(X)*EXP(Y))^4)

 

 

 

 

Result:

X*EXP(4X+4Y)

 

 

 

 

See also:

TEXPAND

 

 

 

 

LINE

Command Operation

 

 

 

 

Type:

 

 

 

 

Description:

Draw Line Command: Draws a line in PICT between the input coordinates.

Access:

!°LPICT LINE

 

( °is the left-shift of the Nkey).

Input/Output:

 

 

 

 

 

 

 

 

 

 

 

 

 

Level 2/Argument 1

Level 1/Argument 2

 

Level 1/Item 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(x1, y1)

(x2, y2)

 

 

 

 

 

 

{ #n1, #m1}

{ #n2, #m2}

 

Example:

This program:

 

 

 

 

 

 

 

 

 

 

 

 

 

« (0,0) (2,3) LINE { # 0d # 0d } PVIEW 7 FREEZE »

 

draws a line in PICT between two user-unit coordinates, displays PICT with pixel coordinate { #

 

0d # 0d } at the upper left corner of the picture display, and freezes the display.

See also:

ARC, BOX, TLINE

 

 

 

 

ΣLINE

Command

 

 

 

 

Type:

 

 

 

 

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Model

 

Form of Expression

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LINFIT

 

mx + b

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOGFIT

 

m ln(x) + b

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EXPFIT

 

bemx

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PWRFIT

 

bxm

 

 

 

 

 

 

 

 

 

Access:

…µ ΣLINE

 

 

 

 

Input/Output:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Level 1/Argument 1

 

Level 1/Item 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

'symbformula'

 

If the current

 

Example:

model is EXPFIT, and if the slope is 5 and the intercept 3, ΣLINE returns

 

'3*EXP(5*X)'.

 

 

 

 

See also:

BESTFIT, COLΣ, CORR, COV, EXPFIT, LINFIT, LOGFIT, LR, PREDX, PREDY, PWRFIT,

 

XCOL, YCOL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LINFIT

Command

 

 

 

 

Type:

 

 

 

 

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.

 

 

Access:

…µLINFIT

 

 

 

 

3-132 Full Command and Function Reference