Histogram3D[{{x_1, y_1}, {x_2, y_2}, ...}] plots a 3D histogram of the values {x_i, y_i}.Histogram3D[{{x_1, y_1}, {x_2, y_2}, ...}, bspec] plots a 3D histogram with bins ...
HistogramDistribution[{x_1, x_2, ...}] represents the probability distribution corresponding to a histogram of the data values x_i.HistogramDistribution[{{x_1, y_1, ...}, ...
HistogramList[{x_1, x_2, ...}] gives a list of bins and histogram heights of the values x_i.HistogramList[{{x_1, y_1, ...}, {x_2, y_2, ...}, ...}] gives a list of bins and ...
Histogram[{x_1, x_2, ...}] plots a histogram of the values x_i.Histogram[{x_1, x_2, ...}, bspec] plots a histogram with bin width specification bspec.Histogram[{x_1, x_2, ...
HitMissTransform[image, ker] gives the hit-and-miss transform of image with respect to the composite structuring element ker.HitMissTransform[image, {ker_1, ker_2, ...}] ...
HITSCentrality[g] gives a list of authority and hub centralities for the vertices in the graph g.
HoldAllComplete is an attribute which specifies that all arguments to a function are not to be modified or looked at in any way in the process of evaluation.
HoldAll
(Built-in Mathematica Symbol) HoldAll is an attribute which specifies that all arguments to a function are to be maintained in an unevaluated form.
HoldComplete[expr] shields expr completely from the standard Mathematica evaluation process, preventing even upvalues associated with expr from being used.
HoldFirst is an attribute which specifies that the first argument to a function is to be maintained in an unevaluated form.