Function is.fullrank [limma v3.28.14]

keywords

algebra

title

Check for Full Column Rank

description

Test whether a numeric matrix has full column rank.

Function projections [lspls v0.2-2]

keywords

algebra

title

Projection and Orthogonalisation

description

Functions to project one matrix onto another, or to ortghogonalise it against the other.

Function make.del [mvnmle v0.1-11.1]

keywords

algebra

title

Make the upper triangular matrix del from a parameter vector

description

make.del takes a parameter vector of length \(k*(k+1)/2\) and returns the upper triangular \(k \times k\) matrix \(\Delta\). make.del is a private function intended for use inside mlest.

Function tr [lmreg v1.2]

keywords

algebra

title

Trace of matrix

description

Computes the trace of a given matrix.

Function my.positive.definite.solve [pendensity v0.2.13]

keywords

algebra

title

my.positive.definite.solve

description

Reverses a quadratic positive definite matrix.

Function dimcalc [lsa v0.73.2]

keywords

algebra

title

Dimensionality Calculation Routines (LSA)

description

Methods for choosing a `good' number of singular values for the dimensionality reduction in LSA.

Function lsa [lsa v0.73.2]

keywords

algebra

title

Create a vector space with Latent Semantic Analysis (LSA)

description

Calculates a latent semantic space from a given document-term matrix.

Function sample.textmatrix [lsa v0.73.2]

keywords

algebra

title

Create a random sample of files

description

Creates a subset of the documents of a corpus to help reduce a corpus in size through random sampling.

Function fold_in [lsa v0.73.2]

keywords

algebra

title

Ex-post folding-in of textmatrices into an existing latent semantic space

description

Additional documents can be mapped into a pre-exisiting latent semantic space without influencing the factor distribution of the space. Applied, when additional documents must not influence the calculated existing latent semantic factor structure.

Function associate [lsa v0.73.2]

keywords

algebra

title

Find close terms in a textmatrix

description

Returns those terms above a threshold close to the input term, sorted in descending order of their closeness. Alternatively, all terms and their closeness value can be returned sorted descending.