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Tracing Evaluation
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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.
MORE INFORMATION
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.
EXAMPLES
CLOSE ALL
Basic Examples
(1)
A recursive definition for finding Fibonacci numbers:
In[1]:=
Show only what sums of
fib
are encountered:
In[2]:=
Out[2]=
Show the beginning of the evaluation chain that leads to each sum of
fib
:
In[3]:=
Out[3]=
Show the entire evaluation chain that leads to each sum of
fib
:
In[4]:=
Out[4]=
SEE ALSO
Trace
StackComplete
TUTORIALS
Tracing Evaluation
New in 2
© 2008 Wolfram Research, Inc.
EXAMPLES
Basic Examples 
