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values in \code{x} must be between the \dQuote{inner} knots
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25 |
values in \code{x} must be between the \dQuote{inner} knots
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\code{knots[ord]} and \code{knots[ length(knots) - (ord-1)]}.}
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\code{knots[ord]} and \code{knots[ length(knots) - (ord-1)]}.}
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\item{ord}{a positive integer giving the order of the spline function.
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\item{ord}{a positive integer giving the order of the spline function.
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This is the number of coefficients in each piecewise polynomial
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This is the number of coefficients in each piecewise polynomial
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segment, thus a cubic spline has order 4. Defaults to 4.}
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segment, thus a cubic spline has order 4. Defaults to 4.}
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\item{derivs}{an integer vector of the same length as \code{x} and with
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\item{derivs}{an integer vector with values between \code{0} and
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values between \code{0} and \code{ord - 1}. The derivative of the
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\code{ord - 1}, conceptually recycled to the length of \code{x}.
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given order is evaluated at the \code{x} positions. Defaults to a
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The derivative of the given order is evaluated at the \code{x}
|
| - |
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positions. Defaults to zero (or a vector of zeroes of the same
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vector of zeroes of the same length as \code{x}.}
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length as \code{x}).}
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\item{outer.ok}{logical indicating if \code{x} should be allowed
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\item{outer.ok}{logical indicating if \code{x} should be allowed
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outside the \emph{inner} knots, see the \code{x} argument.}
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outside the \emph{inner} knots, see the \code{x} argument.}
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\item{sparse}{logical indicating if the result should inherit from class
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\item{sparse}{logical indicating if the result should inherit from class
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\code{"\link[Matrix:sparseMatrix-class]{sparseMatrix}"} (from package \CRANpkg{Matrix}).}
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\code{"\link[Matrix:sparseMatrix-class]{sparseMatrix}"} (from package \CRANpkg{Matrix}).}
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% \code{\linkS4class{sparseMatrix}} (from package \CRANpkg{Matrix}).}
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% \code{\linkS4class{sparseMatrix}} (from package \CRANpkg{Matrix}).}
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}
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}
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| 54 |
\author{Douglas Bates and Bill Venables}
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\author{Douglas Bates and Bill Venables}
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\examples{
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\examples{
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| 56 |
require(graphics)
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require(graphics)
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splineDesign(knots = 1:10, x = 4:7)
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splineDesign(knots = 1:10, x = 4:7)
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| - |
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splineDesign(knots = 1:10, x = 4:7, deriv = 1)
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## visualize band structure
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## visualize band structure
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\donttest{Matrix::drop0(zapsmall(6*splineDesign(knots = 1:40, x = 4:37, sparse = TRUE)))}
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\donttest{Matrix::drop0(zapsmall(6*splineDesign(knots = 1:40, x = 4:37, sparse = TRUE)))}
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62 |
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knots <- c(1,1.8,3:5,6.5,7,8.1,9.2,10) # 10 => 10-4 = 6 Basis splines
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knots <- c(1,1.8,3:5,6.5,7,8.1,9.2,10) # 10 => 10-4 = 6 Basis splines
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x <- seq(min(knots)-1, max(knots)+1, length.out = 501)
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64 |
x <- seq(min(knots)-1, max(knots)+1, length.out = 501)
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