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BUILT-IN MATHEMATICA SYMBOL

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TraceScan

applies f to all expressions used in the evaluation of expr.

TraceScan

includes only those expressions which match form.

TraceScan

includes all evaluations which use transformation rules associated with the symbol s.

TraceScan

applies f before evaluation and fp after evaluation to expressions used in the evaluation of expr.

MORE INFORMATION

All expressions are wrapped in HoldForm to prevent evaluation before f or fp are applied to them.

The function fp is given as an argument for both the form before evaluation and the form after evaluation.

TraceScan returns the result of evaluating expr.

EXAMPLES

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Basic Examples (3)

Print all expressions used for evaluation:

Count additions and multiplications of machine numbers needed for a numerical computation:

A recursive definition for finding Fibonacci numbers:

Count calls to

required:

Redefine

so that it saves results:

Count calls to

required:

The second time through it takes only one call since the value was saved:

Print all expressions used for evaluation:

In[1]:=

Out[1]=

Count additions and multiplications of machine numbers needed for a numerical computation:

In[1]:=

Out[1]=

A recursive definition for finding Fibonacci numbers:

In[1]:=

Count calls to

required:

In[2]:=

Out[2]=

Redefine

so that it saves results:

In[3]:=

Count calls to

required:

In[4]:=

Out[4]=

The second time through it takes only one call since the value was saved:

In[5]:=

Out[5]=