How to set a default value for my custom function
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I hope to create such custom function
function addnum(mat,n=numel(mat))
mat+n
I mean I try to add a number into the element of mtrix mat,but if I don't give a explicit value for n,I hope the n will be the number of the mtrix self.
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Stephen23
le 17 Juil 2017
Modifié(e) : Stephen23
le 17 Juil 2017
Unfortunately MATLAB does not (currently) allow defining default values in the function definition line itself (nor does it allow arguments to be specified by name, only by position). To define a default value you can use the input parser class (I find this slow and pointlessly complex), or simply use nargin like this:
function out = addnum(mat,n)
if nargin<2
n = 3;
end
out = mat+n;
end
For more multiple optional arguments you should consider using a structure or name-value pairs: see my FEX submission num2words for an example of this.
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Lee
le 11 Fév 2023
This is the way to define default number in matlab
function addnum(mat,n)
arguments
mat
n=numel(mat)
end
mat+n
end
Be sure to list all arguments in order
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