DisplayForm[expr] prints with low-level boxes inside expr shown in explicit two-dimensional or other form.
HoldComplete[expr] shields expr completely from the standard Mathematica evaluation process, preventing even upvalues associated with expr from being used.
ShowCursorTracker is an option for Cell that specifies whether an elliptical spot should appear momentarily to guide the eye if the cursor position jumps.
StringReverse["string"] reverses the order of the characters in " string".
PairedTTest[data] tests whether the mean of data is zero. PairedTTest[{data_1, data_2}] tests whether the mean of data_1\[Dash] data_2 is zero.PairedTTest[dspec, \[Mu]_0] ...
VarianceEquivalenceTest[{data_1, data_2, ...}] tests whether the variances of the data_i are equal. VarianceEquivalenceTest[{data_1, ...}, " property"] returns the value of " ...
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.
Threshold[data] thresholds data by replacing values close to zero by zero.Threshold[data, tspec] thresholds data using threshold specification tspec.Threshold[image, ...] ...
ArrayQ
(Built-in Mathematica Symbol) ArrayQ[expr] gives True if expr is a full array or a SparseArray object, and gives False otherwise. ArrayQ[expr, patt] requires expr to be a full array with a depth that ...
MaxRecursion is an option for functions like NIntegrate and Plot that specifies how many recursive subdivisions can be made.