Input/Output:

None

 

See also:

BESTFIT, EXPFIT, LOGFIT, LR, PWRFIT

 

 

 

 

LININ

Function

 

Type:

 

Description:

Linear Test Function: Tests whether an algebraic is structurally linear for a given variable.

 

If any two subexpressions containing a variable (name) are combined only with addition and

 

subtraction, and any subexpression containing the variable is at most multiplied or divided by

 

another factor not containing the variable, the algebraic (symb) is determined to be linear for that

 

variable. LININ returns a 1 if the algebraic is linear for the variable, and a 0 if not.

Access:

!°TEST !«LININ

( °is the left-shift of the Nkey).

Input/Output:

 

 

Level 2/Argument 1

Level 1/Argument 2

 

Level 1/Item 1

 

 

 

 

 

 

 

 

'symb'

'name'

→

0/1

 

 

 

Example 1:

'(X+1)*(Y^-2^Z)+(X/(3-Z^3)' 'X' LININ returns 1.

Example 2:

'(X^2-1)/(X+1)' 'X' LININ returns 0.

 

 

(Although this equation yields a linear equation when factored, LININ tests the equation as

 

described above.)

 

 

 

 

 

 

 

 

 

LINSOLVE

 

 

 

 

 

Type:

Command

 

 

 

Description:

Solves a system of linear equations.

 

 

Access:

Symbolic solve, !Î, PSOLVE, !Ø LIN-S

 

Input:

Level 2/Argument 1: An array of equations.

 

 

 

Level1/Argument 2: A vector of the variables to solve for.

 

Output:

Level 3/Item 1: The system of equations, as a list containing the inputs as above.

 

Level 2/Item 2: A list of the pivot points.

 

 

 

Level 1/Item 3: The solution.

 

 

 

Flags: Exact mode must be set (flag –105 clear).

Numeric mode must not be set (flag –3 clear).

See also:

DESOLVE, SOLVE, MSLV

 

 

 

 

LIST→

Command

 

 

 

 

Type:

 

 

 

 

Description:

List to Stack Command: Takes a list of n objects and returns each object to a separate level, and

 

returns the total number of objects to item n+1 (stack level 1).

 

 

 

The command OBJ→ also provides this function.

 

 

Access:

…µLIST→

 

 

 

 

Input/Output:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Level 1/Argument 1

 

Leveln+1/Item1 ...

Level2/Itemn

Level1/Itemn+1

 

 

 

 

 

 

 

 

 

{ obj1, ...,objn }

→

obj1 ...

objn

n

 

ARRY→,

 

 

 

See also:

DTAG, EQ→, →LIST, OBJ→, STR→

 

 

 

 

 

 

 

 

 

→LIST

Command

 

 

 

 

Type:

 

 

 

 

Description:

Stack to List Command: Takes n specified objects and returns a list of those objects.

Access:

!°TYPE →LIST

 

( °is the left-shift of the Nkey).

 

!°LIST →LIST

 

( °is the left-shift of the Nkey).

Full Command and Function Reference 3-133