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This needs to be repeated for all optional input parameters. This works: function out = foobar(foo, bar, baz)
#How to make a function in matlab 2012 how to
Input parameter handling in Matlab is just really annoying. How to make transfer function if you know. If you do this, you need to make sure that an empty matrix is not an otherwise valid argument to somefxn, otherwise you'll have just overloaded the proper behaviour. Final note, Matlab built-in reshape function will not help you much if you choose my previously explained method.
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You can specify how many poles and zeros you want your transfer function to have, and the. In R2012a, the System Identification Toolbox added support for estimating parameters of a model type that is most intuitive and easiest to work with for controls engineers continuous-time transfer functions. Then, the second optional argument will be assigned whatever you've coded into the function. System identification can help in that case. Then, you could call somefxn with an "empty" second optional argument as: somefxn(myarg, myarg2, myoptarg,, myoptarg3) Then you either need to write logic to parse varargin (as in Christian Clason's comment), or you can use the inputParser object.Īnother (in my opinion, clunkier) way of treating an "empty" optional2 is to test whether the provided argument is simply an empty matrix, with if isempty(cell2mat(varargin(2)) If you need more flexibility, you can do something sort of like keyword arguments by preceding the argument with a descriptive string, which is the way that some common functions like plot work.
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length(varargin) = 0).Ģ) Note that with this scheme, Matlab has no clever way of knowing which function argument fits into which option, so you must keep everything in sequential order. length(varargin) = 1) or no optional arguments (e.g. The 3D map for the gravity data is shown below in Figure 3. This function will create both a 2D map like the ones above and a 3D map. You can have additional conditional statements to handle having only one optional argument (e.g. Another option to generate a real 3D effect much like the one shown in the last post in Surfer I use imageshiny.m, a function by Gordon Cooper available on the Matlab File Exchange. You can have an if statement that says something like if length(varargin) = 2 In this case (for example, if you call somefxm(myarg, myarg2, myoptarg, myoptarg2), then you know based on the length of varargin (2) that only optional3 needs a default applied. 1) In Matlab, if you use varargin, then you must provide all preceding optional arguments (that is, optional must be given as well as optional2).