Work in progress to support parameter etc local sensitivity studies

[sjdaines]

Will also need changes to PALEOmodel

This will require three groups of changes:

• Reaction parameters

  • add field to ReactionBase to hold a NamedTuple of values (probably Dual numbers for AD) that override parametes
  • changes to dispatch to merge in these parameters during dispatch
  • some changes to PALEOmodel to aggregate these into a Vector and calculate Jacobians etc

• Constant Variables (currently initialised via attributes)

  • provide some way of defining which constant variables are considered modifiable for sensitivity studies
  • a method to change values in all data array sets in modeldata (when AD hence additional data arrays in use)

• Initial values for state variables

  • probably needs changes to PALEOmodel to make it convenient to change these

[codecov-commenter]

Codecov Report

Merging #64 (14a7866) into main (05bc6a4) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #64   +/-   ##
=======================================
  Coverage   56.82%   56.82%           
=======================================
  Files          38       38           
  Lines        3833     3833           
=======================================
  Hits         2178     2178           
  Misses       1655     1655           

Impacted Files	Coverage Δ
src/Reaction.jl	82.83% <ø> (ø)

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[sjdaines]

Now mostly implemented, see #123