Texas Instruments TI-89

Appendix A: System Routines — Math
795
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
push_ln
Declaration:
void
push_ln
(EStackIndex
k
)
Category(ies):
Math
Description:
Pushes onto the estack the natural logarithm of the expression indexed by
k
. When
k
indexes a square numeric matrix, pushes the Float matrix ln
computed via ln(eigenvalues).
Inputs:
k
— Index of the top tag of an internally-simplified algebraic expression,
algebraic comparison, or aggregate thereof.
Outputs:
None
Assumptions:
None
Side Effects:
None
Availability:
On AMS 2.02 and higher.
TI
-
89 / TI
-
92 Plus
Differences:
None
See Also: push_log10, push_exp
Example:
push_quantum (8u); /* Push variable x */
push_quantum (EXP_TAG);
push_ln (top_estack); /* Pushes a copy of the variable x. */