A Simple Way to Specify Symmetric, Block Diagonal Matrices
As lower triangular matrix
This function is used to get the pointers to the C objects that are us...
Easily Specify block-diagonal matrices with lower triangular info
Change a matrix or lotri matrix to a lotri expression
Convert a lotri data frame to a lotri expression
Extract or remove lotri estimate data frame from lotri object
Determine if the matrix is a block matrix
Create a matrix from a list of matrices
Converts a matrix into a list of block matrices
C++ implementation of Matrix's nearPD
Separate a lotri matrix into above and below lotri matrices
Use the RCM algorithm to permute to banded matrix
Provides a simple mechanism to specify a symmetric block diagonal matrices (often used for covariance matrices). This is based on the domain specific language implemented in 'nlmixr2' but expanded to create matrices in R generally instead of specifying parts of matrices to estimate. It has expanded to include some matrix manipulation functions that are generally useful for 'rxode2' and 'nlmixr2'.
Useful links