tensorA: Advanced tensors arithmetic with named indices

The package provides convenience functions for advance linear algebra with tensors and computation with datasets of tensors on a higher level abstraction. It includes Einstein and Riemann summing conventions, dragging, co- and contravariate indices, parallel computations on sequences of tensors.

AuthorK. Gerald van den Boogaart <boogaart@uni-greifswald.de>
Date of publication2010-12-01 15:07:54
MaintainerK. Gerald van den Boogaart <boogaart@math.tu-freiberg.de>
LicenseGPL (>= 2)
Version0.36
http://www.stat.boogaart.de/tensorA

View on CRAN

Man pages

addtensor: Element-wise arithmetic operations +,-,*,/ with tensors

astensor: Coercion to a tensor

bindtensor: A cbind/rbind for tensors

choltensor: Cholesky decomposition of a tensor

deltatensor: Creates a Kronecker delta tensor

diagmul: Multiplication of a tensor with a tensor given by its...

diagtensor: Creates a "diagonal" tensor

dragtensor: Managing covariate and contravariate indices

einstein: Tensor multiplication with Einstein's convention, by summing...

ftabletensor: Pretty printing of tensors

invtensor: Inversion of a tensor as linear mapping from tensors to...

istensor: Checking for being a tensor

leveltensor: The level (number of indices) of a tensor

margin: Marginalization of tensors

marktensor: Marks the names of a tensor with a mark

meantensor: Mean and variance of tensors

multensor: Tensor multiplication for the tensor class

names: Getting and setting index and dimensionnames of a tensor

normtensor: Calculate the Euclidean norm or Euclidean operator norm of a...

onetensor: Creates a tensor with all entries 1

postensor: enumeration of index combinations

powertensor: Compute the power of a symmetric tensor

reordertensor: Permutation of indices and storage sequence of a tensor

reptensor: Repeats a tensor

riemann: Tensor multiplication with Riemann's convention

sequencing: Working with index sequences

slicetensor: Working with the indices of a tensor (accessing, slicing,...

solvetensor: Solving linear equations with tensors

svdtensor: Singular value decomposition of tensors

tensorA.package: The tensorA package for tensor arithmetic

tomatrixtensor: The matrix corresponding to a tensor seen as a linear mapping...

toPos: get the position of an index of tensor

totensor: Creates a tensor object

tracetensor: Collapse a tensor

tripledelta: A tensor with entry 1 if and only if three indices are equal

undroptensor: Adds a spurious dimension to a tensor

untensor: Removes indices/dimensions from a tensor

Questions? Problems? Suggestions? or email at ian@mutexlabs.com.

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