Testing and searching for elements of lists. "Getting Pieces of Lists" discusses how to extract pieces of lists based on their positions or indices. Mathematica also has ...

Pure functions. When you use functional operations such as Nest and Map, you always have to specify a function to apply. In all the examples above, we have used the "name" of ...

Correlation[v_1, v_2] gives the correlation between the vectors v_1 and v_2.Correlation[m] gives the correlation matrix for the matrix m.Correlation[m_1, m_2] gives the ...

f /: lhs = rhs assigns rhs to be the value of lhs, and associates the assignment with the symbol f.

CorrelationDistance[u, v] gives the correlation coefficient distance between vectors u and v.

CreatePalette[expr] creates a palette notebook containing expr, and opens it in the front end.CreatePalette[{expr_1, expr_2, ...}] creates and opens a palette notebook ...

PaletteNotebook[{cell_1, cell_2, ...}] represents a palette notebook that can be manipulated by the Mathematica front end.

TreeGraphQ[g] yields True if the graph g is a tree and False otherwise.

When you write down a set of simultaneous equations in Mathematica, you are specifying a collection of constraints between variables. When you use Solve, you are finding ...

Generate Palette from Selection converts a selection into a palette.