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42 :
43 : !> \brief
44 : !> This module contains the classes and procedures for setting up the `adaptiveUpdatePeriod` attribute of samplers of class [ParaDRAM_type](@ref paradram_mod::paradram_type).
45 : !> For more information, see the description of this attribute in the body of the module.
46 : !> \author Amir Shahmoradi
47 :
48 : module SpecDRAM_AdaptiveUpdatePeriod_mod
49 :
50 : use Constants_mod, only: IK
51 : implicit none
52 :
53 : character(*), parameter :: MODULE_NAME = "@SpecDRAM_AdaptiveUpdatePeriod_mod"
54 :
55 : integer(IK) :: adaptiveUpdatePeriod ! namelist input
56 :
57 : type :: AdaptiveUpdatePeriod_type
58 : integer(IK) :: val
59 : integer(IK) :: def
60 : integer(IK) :: null
61 : character(:), allocatable :: desc
62 : contains
63 : procedure, pass :: set => setAdaptiveUpdatePeriod, checkForSanity, nullifyNameListVar
64 : end type AdaptiveUpdatePeriod_type
65 :
66 : interface AdaptiveUpdatePeriod_type
67 : module procedure :: constructAdaptiveUpdatePeriod
68 : end interface AdaptiveUpdatePeriod_type
69 :
70 : private :: constructAdaptiveUpdatePeriod, setAdaptiveUpdatePeriod, checkForSanity, nullifyNameListVar
71 :
72 : !%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
73 :
74 : contains
75 :
76 : !%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
77 :
78 1047 : function constructAdaptiveUpdatePeriod(ndim,methodName) result(AdaptiveUpdatePeriodObj)
79 : #if INTEL_COMPILER_ENABLED && defined DLL_ENABLED && (OS_IS_WINDOWS || defined OS_IS_DARWIN)
80 : !DEC$ ATTRIBUTES DLLEXPORT :: constructAdaptiveUpdatePeriod
81 : #endif
82 : use Constants_mod, only: IK, NULL_IK
83 : use String_mod, only: num2str
84 : implicit none
85 : integer(IK), intent(in) :: ndim
86 : character(*), intent(in) :: methodName
87 : type(AdaptiveUpdatePeriod_type) :: AdaptiveUpdatePeriodObj
88 1047 : AdaptiveUpdatePeriodObj%def = ndim * 4_IK !+ 1_IK ! max(ndim+1_IK,100_IK)
89 1047 : AdaptiveUpdatePeriodObj%null = NULL_IK
90 : AdaptiveUpdatePeriodObj%desc = &
91 : "Every adaptiveUpdatePeriod calls to the objective function, the parameters of the proposal distribution will be updated. &
92 : &The variable adaptiveUpdatePeriod must be a positive integer (>0). The smaller the value of adaptiveUpdatePeriod, &
93 : &the easier it will be for the " // methodName // " kernel to adapt the proposal distribution to the covariance structure &
94 : &of the objective function. However, this will happen at the expense of slower simulation runtime as the adaptation &
95 : &process can become computationally expensive, in particular, for very high dimensional objective functions (ndim>>1). &
96 : &The larger the value of adaptiveUpdatePeriod, the easier it will be &
97 : &for the " // methodName // " kernel to keep the sampling efficiency close to the requested target acceptance rate range &
98 : &(if specified via the input variable targetAcceptanceRate). &
99 : &However, too large values for adaptiveUpdatePeriod will only delay the adaptation of the proposal distribution to &
100 : &the global structure of the objective function that is being sampled. &
101 : &If adaptiveUpdatePeriod>=chainSize, then no adaptive updates to the proposal distribution will be made. &
102 : &The default value is 4 * ndim, where ndim is the dimension of the domain of the objective function to be sampled. &
103 : &In this particular " // methodName // " simulation, this corresponds to the value " // &
104 1047 : num2str(AdaptiveUpdatePeriodObj%def) // "."
105 1047 : end function constructAdaptiveUpdatePeriod
106 :
107 : !%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
108 :
109 1047 : subroutine nullifyNameListVar(AdaptiveUpdatePeriodObj)
110 : #if INTEL_COMPILER_ENABLED && defined DLL_ENABLED && (OS_IS_WINDOWS || defined OS_IS_DARWIN)
111 : !DEC$ ATTRIBUTES DLLEXPORT :: nullifyNameListVar
112 : #endif
113 : implicit none
114 : class(AdaptiveUpdatePeriod_type), intent(in) :: AdaptiveUpdatePeriodObj
115 1047 : adaptiveUpdatePeriod = AdaptiveUpdatePeriodObj%null
116 1047 : end subroutine nullifyNameListVar
117 :
118 : !%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
119 :
120 1107 : subroutine setAdaptiveUpdatePeriod(AdaptiveUpdatePeriodObj,adaptiveUpdatePeriod)
121 : #if INTEL_COMPILER_ENABLED && defined DLL_ENABLED && (OS_IS_WINDOWS || defined OS_IS_DARWIN)
122 : !DEC$ ATTRIBUTES DLLEXPORT :: setAdaptiveUpdatePeriod
123 : #endif
124 1047 : use Constants_mod, only: IK
125 : implicit none
126 : class(AdaptiveUpdatePeriod_type), intent(inout) :: AdaptiveUpdatePeriodObj
127 : integer(IK), intent(in) :: adaptiveUpdatePeriod
128 1107 : AdaptiveUpdatePeriodObj%val = adaptiveUpdatePeriod
129 1029 : if ( AdaptiveUpdatePeriodObj%val==AdaptiveUpdatePeriodObj%null ) AdaptiveUpdatePeriodObj%val = AdaptiveUpdatePeriodObj%def
130 1107 : end subroutine setAdaptiveUpdatePeriod
131 :
132 : !%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
133 :
134 1035 : subroutine checkForSanity(AdaptiveUpdatePeriodObj,Err,methodName)
135 : #if INTEL_COMPILER_ENABLED && defined DLL_ENABLED && (OS_IS_WINDOWS || defined OS_IS_DARWIN)
136 : !DEC$ ATTRIBUTES DLLEXPORT :: checkForSanity
137 : #endif
138 1107 : use Constants_mod, only: IK
139 : use Err_mod, only: Err_type
140 : use String_mod, only: num2str
141 : implicit none
142 : class(AdaptiveUpdatePeriod_type), intent(in) :: AdaptiveUpdatePeriodObj
143 : character(*), intent(in) :: methodName
144 : type(Err_type), intent(inout) :: Err
145 : character(*), parameter :: PROCEDURE_NAME = "@checkForSanity()"
146 1035 : if ( AdaptiveUpdatePeriodObj%val<1_IK) then
147 6 : Err%occurred = .true.
148 : Err%msg = Err%msg // &
149 : MODULE_NAME // PROCEDURE_NAME // ": Error occurred. &
150 : &Invalid requested value for adaptiveUpdatePeriod. &
151 : &The input requested value for adaptiveUpdatePeriod (" // num2str(AdaptiveUpdatePeriodObj%val) // &
152 : ") cannot be less than 1. If you are not sure of the appropriate value for adaptiveUpdatePeriod, drop it &
153 6 : &from the input list. " // methodName // " will automatically assign an appropriate value to it.\n\n"
154 : end if
155 2070 : end subroutine checkForSanity
156 :
157 : !%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
158 :
159 : end module SpecDRAM_AdaptiveUpdatePeriod_mod ! LCOV_EXCL_LINE
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