BUILT-IN MATHEMATICA SYMBOL
TraceAbove
TraceAbove
is an option for Trace and related functions which specifies whether to include evaluation chains which contain the evaluation chain containing the pattern form sought.
- TraceAbove->True includes the first and last expressions in all evaluation chains within which the evaluation chain containing form occurs.
- TraceAbove->All includes all expressions in these evaluation chains.
- TraceAbove->{backward, forward} allows you to specify separately which expressions to include in the backward and forward directions.
- Using TraceAbove, you can see the complete paths by which expressions matching form arose during an evaluation.
A recursive definition for finding Fibonacci numbers:
Show only what sums of 
are encountered:
| Out[2]= |  |
Show the beginning of the evaluation chain that leads to each sum of 
:
| Out[3]= |  |
Show the entire evaluation chain that leads to each sum of 
:
| Out[4]= |  |
New in 2
