Reference Guide

3-252 Full Command and Function Reference
TEVAL
Type: Function
Description: For the specified operation, performs the same function as EVAL, and returns the time taken to
perform the evaluation as well as the result.
Access: …µ TEVAL
Input/Output:
Level 1/Argument 1 Level 2/Item 2 Level 1/Item 1
Object
→
result time taken
See also: EVAL
TEXPAND
Type: Command
Description: Expands transcendental functions.
Access: !Ð, P ALG , P TRIG, …×L, …ÑL, PL EXPLN
Input: An expression.
Output: The transformation of the expression.
Flags: Exact mode must be set (flag –105 clear).
Numeric mode must not be set (flag –3 clear).
Radians mode must be set (flag –17 set).
Example: Expand the following expression:
ln(sin(x+y))
Command: TEXPAND(LN(SIN(X+Y)))
Result: LN(COS(Y)*SIN(X)+SIN(Y)* COS(X))
See also: TCOLLECT, TLIN
TEXT
Type: Command
Description: Show Stack Display Command: Displays the stack display.
TEXT switches from the graphics display to the stack display. TEXT does not update the stack
display.
Access: !° L OUT TEXT ( °is the left-shift of the Nkey).
Input/Output: None
Example: The command sequence DRAW 5 WAIT TEXT selects the graphics display and plots the
contents of the reserved variable EQ (or reserved variable ΣDAT). It subsequently waits for 5
seconds, and then switches back from the graphics display to the stack display.
See also: PICTURE, PVIEW
THEN
Type: Command
Description: THEN Command: Starts the true-clause in conditional or error-trapping structure.
See the IF and IFFER entries for more information.
Access: !° BRANCH IF / CASE THEN ( °is the left-shift of the Nkey).
Input/Output: None
See also: CASE, ELSE, END, IF IFERR