R: Extract sub-matrices of variance.

extract.variance_covariance {PhylogeneticEM} | R Documentation

## Extract sub-matrices of variance.

### Description

`extract.variance_covariance` return the adequate sub-matrix.

### Usage

    ## S3 method for class 'variance_covariance'
    extract(struct, what = c("YY", "YZ", "ZZ"),
      masque_data = c(rep(TRUE, attr(struct, "ntaxa") * attr(struct, "p_dim")),
      rep(FALSE, (dim(struct)[1] - attr(struct, "ntaxa")) * attr(struct, "p_dim"))))

### Arguments

`struct` | structural matrix of size (ntaxa+nNode)*p, result of function `compute_variance_covariance`
`what:` | sub-matrix to be extracted: "YY" : sub-matrix of tips (p*ntaxa first lines and columns) "YZ" : sub matrix tips x nodes (p*nNodes last rows and p*ntaxa first columns) "ZZ" : sub matrix of nodes (p*nNodes last rows and columns)
`miss;` | missing values of Y_data

### Value

sub-matrix of variance covariance.

[Package PhylogeneticEM version 1.1.0 Index]