subst_value: Substitute a value in a system of linear (in)equations

In lintools: Manipulation of Linear Systems of (in)Equalities

Substitute a value in a system of linear (in)equations

Description

Substitute a value in a system of linear (in)equations

Usage

subst_value(A, b, variables, values, remove_columns = FALSE, eps = 1e-08)

Arguments

A	[numeric] matrix
b	[numeric] vector
variables	[numeric|logical|character] vector of column indices in A
values	[numeric] vecor of values to substitute.
remove_columns	[logical] Remove spurious columns when substituting?
eps	[numeric] scalar. Any value with absolute value below eps will be interpreted as zero.

Value

A list with the following components:

• A: the A corresponding to the simplified sytem.

• b: the constant vector corresponding to the new system

Details

A system of the form Ax <= b can be simplified if one or more of the x[i] values is fixed.

lintools documentation built on Jan. 17, 2023, 1:06 a.m.