ReliabilityTheory (version 0.3.1)

setCompTypes: Set component types in a system

Description

A system created with createSystem by default assumes components to be of the same type. This function enables assigning particular types (or modified from a previous types assignment) to each component after system creation.

Usage

setCompTypes(sys, types)

Value

The system which was passed in the sys argument is returned with the component types updated.

Arguments

sys

a system object representing the system whose types are to be set. This should have been created by a call to createSystem.

types

a named list of vectors. The names correspond to component types, whilst each vector indicates which components are of that type.

Author

Louis J.M. Aslett (https://www.louisaslett.com/)

Details

This function enables specifying (or modifying) the types of the components in a system. The types can be specified when the system is initially defined using createSystem, but if none are specified at that time then it is assumed all components are of the same type.

The types argument should be a named list of vectors, for example list("a" = 1:3, "b" = c(4,6), "c" = 5) would specify that component numbers 1 through 3 are of type a, 4 and 6 are type b, with the remaining component 5 as type c. The numbering should match numbering used when creating the system. The start and terminal nodes should not be given a type (as they are assumed perfectly reliable).

See Also

createSystem

Examples

## EXAMPLE 1
## Figure 1 in Coolen and Coolen-Maturi (2012)

# First, define the structure, ensuring that each physically separate component
# is separately numbered
fig1 <- createSystem(s -- 1 -- 2:3 -- 4 -- 5:6 -- t, 2 -- 5, 3 -- 6)

# Second, assign types to the components with this function
setCompTypes(fig1, list("Type 1" = c(1, 2, 5), "Type 2" = c(3, 4, 6)))

# Note that one can create the same system and avoid using setCompTypes by
# specifying the types in the initial call to createSystem if desired.
# The following code results in exactly the same system specification as fig1:
fig1b <- createSystem(s -- 1 -- 2:3 -- 4 -- 5:6 -- t, 2 -- 5, 3 -- 6,
                      types = list("Type 1" = c(1, 2, 5), "Type 2" = c(3, 4, 6)))