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i have been given to design software.i have designed the overall process using box and arrow notation .i want to know for high level design of software is there any specific notation to follow.
One of the most commonly used notations is UML or Unified Modelling Language.
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When should one consider using a metamodel in place of an expensive analysis component? I haven't actually seen an example of an openMDAO project that uses metamodels yet, so I was wondering if they're recommended or whether it's still best to treat expensive analyses like normal ones.
Using a metamodel is a trade-off. You trade accuracy vs execution time so it is up to you in your context.
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What were the design decisions that led to R having often more than one way of doing things, that have subtle difference? See, for a good example,
https://www.r-bloggers.com/r-na-vs-null/
More more such issues are here, some which are justified, some which are not http://r4stats.com/articles/why-r-is-hard-to-learn/
From a software engineering perspective, having such choices in a language screams for having subtle and hard-to-find bugs in your code (e.g. in Python the whole point of writing "pythonic" code, that avoids ambiguity and is easy to read and consistent in style). So there must be some major advantages of having that. What are they?
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I see plenty of mentions of their categorical dual, i.e. co-mbinators like y-combinator, etc. But no one seems to give an example of an mbinator? Even wiki.haskell.org/Combinator doesn't mention it.
The etymology doesn't involve "co-". I guess you could ask about "binator", which might make pairs without putting them together. But that's not a very useful concept.
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I'm facing with a large scale multi-objective optimization problem, after a long search I have not found any useful package in R.
Please help me in this regard and i am not restricted to any particular method. Please tell me if there is any package in R using which I can solve Multi-Objective Mathematical Programming Problems.
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I want to make a CRM (like vtiger, suger crm)using Symfony 2 how I start it?
what kind of areas should I fillow?
Where from I stated it?
what are the areas I fi
have a look at orocrm.com it's based on symfony2, it may be a good starting point for use or inspiration