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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"we lack a real 'addParamGroup' implementation.","articleBody":"The 'append' method of adding a group of parameters, as described in the manual, is very clunky and not what we need.\n\nFor example, in the tutorial we have an example which adds three parameters like this:\n\npGroup = [RAT.models.Parameter(name='Layer thick', min=10, value=20, max=30, fit=True),\n          RAT.models.Parameter(name='Layer SLD', min=1e-6, value=3e-6, max=5e-6, fit=True),\n          RAT.models.Parameter(name='Layer rough', min=5, value=7, max=10, fit=True)]\n\nproblem.parameters.extend(pGroup)\n\nThis is a lot of typing!\n\nIn fact, all the relevant information from that can be summarised in a simple list:\n\nIn [4]: myParams = [['Layer thick',10,20,30,True], ['Layer SLD', 1e-6, 3e-6, 5e-6, True], ['Layer rough',5,7,10,True]]\n\nIn [5]: print(myParams)\n[['Layer thick', 10, 20, 30, True], ['Layer SLD', 1e-06, 3e-06, 5e-06, True], ['Layer rough', 5, 7, 10, True]]\n\nThe addParamGroup option should accept a simple list like this, and then do the Rat.models.Parameter... stuff under the hood for the user. This method would then be in alignment with the Matlab one, where a simple cell array is used to define the parameter block.\n\nA\n\n\n\n","author":{"url":"https://github.com/arwelHughes","@type":"Person","name":"arwelHughes"},"datePublished":"2025-04-23T15:29:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/149/python-RAT/issues/149"}