lotriMat: Create a matrix from a list of matrices

In nlmixrdevelopment/lotri: A Simple Way to Specify Symmetric, Block Diagonal Matrices

Description

This creates a named banded symmetric matrix from a list of named symmetric matrices.

Usage

lotriMat(matList, format = NULL, start = 1L)

Arguments

matList	list of symmetric named matrices
format	The format of dimension names when a sub-matrix is repeated. The format will be called with the dimension number, so "ETA[%d]" would represent "ETA[1]", "ETA[2]", etc
start	The number the counter of each repeated dimension should start.

Value

Named symmetric block diagonal matrix based on concatenating the list of matrices together

Author(s)

Matthew Fidler

Examples

testList <- list(lotri({et2 + et3 + et4 ~ c(40,
                           0.1, 20,
                           0.1, 0.1, 30)}),
                 lotri(et5 ~ 6))

testList

lotriMat(testList)


# Another option is to repeat a matrix a number of times.  This
# can be done with list(matrix, # times to repeat).

# In the example below, the first matrix is repeated 3 times
testList <- list(list(lotri({et2 + et3 + et4 ~ c(40,
                           0.1, 20,
                           0.1, 0.1, 30)}), 3),
                 lotri(et5 ~ 6))

lotriMat(testList)

# Notice that the dimension names `et2`, `et3` and `et4` are
# repeated.

# Another option is to name the dimensions.  For example it could
# be `ETA[1]`, `ETA[2]`, etc by using the 'format' option:

lotriMat(testList, "ETA[%d]")

# Or could start with ETA[2]:

lotriMat(testList, "ETA[%d]", 2)

nlmixrdevelopment/lotri documentation built on April 22, 2021, 2:21 a.m.