Function Metrics
The following metrics are generated for functions (methods) in the project source code. For library functions (those functions in the source code for which there is no definition), only the fanin metrics apply.
Size Metrics
Lines in Function  Number of lines in the function. 
Lines of Source Code  Number of lines in the function that have source code, i.e. all lines except empty lines, lines that have just comments, and lines omitted because of preprocessor conditions. 
Variables in Function  Number of parameters and locals variables in the function. 
 To be accurate (nonzero), data must be collected with the locals option enabled. 
McCabe Complexity Metrics
McCabe Cyclomatic Cmplx  Cyclomatic complexity of the function (McCabe v(G)). This represents the number of decision points in the function. It also represents the number of linearly independent test paths through the function. Users may also select alternative calculations of cyclomatic complexity, either Myers' 1979 Extension counting predicates within decisions, or the Modified definition counting parallel cases as a single decision. 
McCabe Decision Density  Decision density (cyclomatic density) of a function. Calculated as the ratio of the cyclomatic complexity to the lines of statements for the function. 
McCabe Essential Cmplx  Essential complexity of the function (McCabe ev(G)). This represents the number of decision points in the function which contain unstructured constructs. 
McCabe Essential Density  Essential density, or degree of unstructuredness, of a function. Calculated as the ratio of the essential complexity to the cyclomatic complexity. 
Other Complexity Metrics
Decision Depth in Function  Number of nested levels of decisions or control statements within the function. 
Halstead Intelligent Content  Languageindependent measure of the amount of content (complexity) of the function (Halstead I). 
Halstead Mental Effort  Measure of the number of elemental mental discriminations necessary to create, or understand, the function (Halstead E). 
Halstead Program Volume  Measure of the information content of the function (Halstead V). 
Halstead Program Difficulty  Measure of how compactly the function implements its algorithms (Halstead D). This is the inverse of the Halstead Program Level (of abstraction). 
Knots  Measure of the complexity and unstructuredness of the function (Woodward, Hennell and Hedley knot). 
Control Flow Metrics
Fan In of Function Calls  Number of functions in the source files loaded into the project which call or read the function, either directly or through function pointers. 
Fan Out of Function Calls  Number of functions which are called or read by the function, either directly or through function pointers. 
Global Variables Used  Number of global variables set and/or read by the function. 
Static Variables Used  Number of static variables set and/or read by the function. 
Transitive Fan In of Funcs  Number of functions in the source files loaded into the project which transitively call or read the function, including calls through function pointers. 
Transitive Fan Out of Funcs  Number of functions which are transitively called or read by the function, including calls through function pointers. 
Profile Metrics
 All profile metrics require that appropriate profile data be loaded. 
Coverage  Percentage of blocks of code that were executed. 
Frequency  Number of times the function was called during execution. 
Time  Time spent executing the function. 
