RotateLabel is an option for graphics and related functions that specifies whether labels on vertical frame axes should be rotated to be vertical.

In an expression like f[{a,b,c}] you are giving a list as the argument to a function. Often you need instead to apply a function directly to the elements of a list, rather ...

 

HoldForm[expr] prints as the expression expr, with expr maintained in an unevaluated form.

DirectoryName["name"] extracts the directory name from the specification for a file.

NonConstants is an option for D which gives a list of objects to be taken to depend implicitly on the differentiation variables.

NumberSigns is an option for NumberForm and related functions which gives strings to use as signs for negative and positive numbers.

EdgeCount[g] gives a count of the number of edges in the graph g.EdgeCount[g, patt] gives a count of the number of edges that match the pattern patt.

Flatten[list] flattens out nested lists. Flatten[list, n] flattens to level n. Flatten[list, n, h] flattens subexpressions with head h. Flatten[list, {{s_11, s_12, ...}, ...

Mathematica allows data stored in standard systems formats to be analyzed and synthesized using the full power of Mathematica.