Index_Rmng_Fctrs_Start_Base_Tag - Texas Instruments TI-89 Developer's Manual

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index_rmng_fctrs_start_base_tag

Declaration: EStackIndex index_rmng_fctrs_start_base_tag (EStackIndex i ,
Quantum q )
Category(ies): Algebra Utilities
Description: This function can be used together with push_but_factor to push a
product of all but the first syntactic factor having base tag q in expression i .
i
Inputs:
q — Primary tag.
Outputs: Returns NULL_INDEX if ESTACK (lead_base_index( i )) != q and
ESTACK (lead_base_index (remaining_factors_index( i ))) != q and
ESTACK (lead_base_index (remaining_factors_index
(remaining_factors_index( i )))) != q , etc.
Otherwise returns the shallowest k such that ESTACK
(lead_base_index( k )) == q and ( k = i or k = remaining_base_index( i ) or
k = remaining_base_index (remaining_factors_index( i )) or . . . ).
Assumptions: None
Side Effects: None
Availability: All versions of the TI-89 / TI-92 Plus.
TI-89 / TI-92 Plus
Differences: None
See Also: rmng_fctrs_start_fctr_tag, index_rmng_fctrs_start_base,
index_rmng_factor
Example:
push_quantum (10u);
push_quantum (EXP_TAG);
push_quantum_as_nonnegative_int (2u);
push_quantum (9u);
push_quantum (EXP_TAG);
push_quantum (EXPONENTIATION_TAG);
push_quantum (MULTIPLY_TAG);
k = top_estack;
push_quantum (8u);
push_quantum (LN_TAG);
push_quantum (MULTIPLY_TAG);
i = top_estack;
index_rmng_fctrs_start_base_tag (top_estack, EXP_TAG);
index_rmng_fctrs_start_base_tag (top_estack, LN_TAG);
index_rmng_fctrs_start_base_tag(top_estack,ABS_TAG);
TI-89 / TI-92 Plus Developer Guide
Appendix A: System Routines — Algebra Utilities
— Index of the top tag of an internally-simplified algebraic expression.
/* exp(z) */
/* exp(y)^2 */
/* ln(x) */
/* ln(x) * exp(y)^2 * exp(z) */
Not for Distribution
/* Returns k */
/* Returns i */
/* Returns NULL_INDEX */
Beta Version January 26, 2001