OpenerView[{expr_1, expr_2}] represents an object which displays as an opener, together with expr_1 if the opener is closed, and both expr_1 and expr_2 if it is ...

GraphData[name] gives a graph with the specified name.GraphData[name, " property"] gives the value for the specified property for a named graph.GraphData["class"] gives a ...

Database connection pools are a common way to improve the performance of database operations. They can be useful because creating a new connection can easily take several ...

DesignMatrix[{{x_11, x_12, ..., y_1}, {x_21, x_22, ..., y_2}, ...}, {f_1, f_2, ...}, {x_1, x_2, ...}] constructs the design matrix for the linear model \[Beta]_0 + \[Beta]_1 ...

StateOutputEstimator[ss, l] constructs an estimator for the StateSpaceModel object ss with estimator gain matrix l.StateOutputEstimator[{ss, sensors}, l] uses only sensors as ...

AddEdge[g, e] returns a graph g with the new edge e added. e can have the form {a, b} or the form {{a, b}, options}.

AddVertex[g] adds one disconnected vertex to graph g. AddVertex[g, v] adds to g a vertex with coordinates specified by v.

AntiSymmetricQ[g] yields True if the adjacency matrix of g represents an anti-symmetric binary relation.

ApproximateVertexCover[g] produces a vertex cover of graph g whose size is guaranteed to be within twice the optimal size.

CompleteBinaryTree[n] returns a complete binary tree on n vertices.