Introduction | Local stored object caches | Centrally stored object caches | Tips, warnings and gratuitous advice | Some technical details | Some packages with a similar functionality

Introduction | A glimpse at the data | References

A univariate polynomial class for R | Introduction and summary | Relation to the previous package, polynom | General orientation | Changes in versions 2.0-0 and 2.0-1 | A vignette has been added | Additional orthogonal polynomial facilities | Notes | Examples | Miscellaneous computations using polynomial arithmetic | Discrete orthogonal polynomials | Chebyshev polynomial approximation I | Chebyshev polynomial approximation II | A simple branching process | Polynomials can be numerically fragile

Preamble | Masking select from other packages | Amble | The box_cox extensions | Stepwise model building extensions | Examples | Non-gaussian models | Scaling functions | Kernel density estimation | Postamble

Introduction | Some theory | Examples | The double classification | Synopsis and higher way extensions | References

Preamble | Example | Scale dependence | Closed curves | Other tools | grid-based graphics systems | Postamble

Preamble | A Univariate Polynomial Class for R | Introduction and summary | General orientation | Notes | Examples

Genesis and development | Examples

Rationale | How to use it | Arguments | Examples | Notes | The number of leading hash characters | Sending text strings to the clipboard | Gratuitous advice

Introduction | Solving Sudoku puzzles and making new ones | The solution algorithm | Making Sudoku designs (or puzzles) | Prescribed patterns | print and plot methods | Input and frivolities

Introduction | The Jacobi eigenvalue algorithm | Parallel revival | Purpose of this package | Brief synopsis of the algorithm | Let $S$ be a $2\times2$ symmetric matrix, with entries $s_{ij}$. It it well known that any symmetric matrix may be diagonalized by an orthogonal similarity transformation. In symbols, for this special case, this implies we need to choose a value for $\theta$ for which:$$ H^{\mathsf{T}} S H =\left[\begin{array}{lr}\cos \theta & -\sin \theta \\sin \theta & \cos \theta\end{array} \right]\left[\begin{array}{lr}s_{11} & s_{12} \s_{21} & s_{22}\end{array} \right]\left[\begin{array}{rr}\cos \theta & \sin \theta \-\sin \theta & \cos \theta\end{array} \right] | Stagewise protocol | Examples | Code | R | Rcpp

Introduction | Caveat | Functions | fractional and unfractional | unfractional | Use of fractional objects in arithmetic operations. | as.character | numerators and denominators | numerical | rat, ratr and .ratr | vfractional | Some simple examples | Arithmetic operations | The Golden Ratio and Fibonacci numbers | Random fractions

Rational approximation by continued fractions | Real numbers into continued fractions | Some theoretical examples | Implementation in R | Some elementary properties | References