Error: Function definition not supported in this context. Create functions in code file.

I have a problem with launching a function I created. Can anybody help me what's wrong with this line?

error: Error: File: MetData3.m Line: 10 Column: 5

Function definition not supported in this context. Create functions in code file.

Code:

classdef MetData3
    properties
        WindSpeed
    end
    properties (Access=protected)
        Gamma = 1.7934;
        Beta = 4.1007;
    end
    
    function WeibData = WeibFormWind(theMetData)
    try
        WeibData=zeros(1,max(theMetData.WindSpeed));
        for j=1:1:max(size(WeibData))
            i=1;
            for k=1:1:max(size(theMetData.WindSpeed))
                if theMetData.WindSpeed(k)==j
                    WeibData(j)=WeibData(j)+theMetData.WindSpeed(k);
                    i=i+1;
                end
            end
        end
        WeibData=WeibData/sum(theMetData.WindSpeed);
        bar(WeibData);
    catch
        disp('Problem')
    end
    end
    
    function monthYield = monthWeibull(theMetData)
    close all
    montrYield = zeros(1,max(size(theMetData.monthAvrWS)));
    for k=1:1:max(size(theMetData.monthAvrWS))
        B = theMetData.Beta * theMetData.monthAvrWS(k);
        v = 0:0.1:20;
        Weib1 = @(u) (theMetData.Gamma/B).*(u*(1/B)).*exp(-(u*(1/B)).^2);
        Weib2 = @(u) ((theMetData.Gamma/B).*(u*(1/B)).*exp(-(u*(1/B)).^2).sin((pi/2)*((u-theMetData.Vd)/(theMetData.Vo-theMetData.Vd))));
        t1=integral(Weib1, theMetData.Vo, theMetData.Vg);
        E1=(theMetData.Gamma/B)*theMetData.Nn*t1;
        t2=integral(Weib2, theMetData.Vd, theMetData.Vo);
        E2=(theMetData.Gamma/B)*theMetData.Nn*t2;
        monthYield(k)=E1+E2;
        curve=Weib1(v);
        plot(v,curve);grid on,hold on;
        xlabel('prędkość wiatru');ylabel('t/T');
    end
    hold off;
    end
    end

Answer 1

[Steven Lord]

In a classdef file, functions that you want to be methods of the class need to be in a methods block. Note that in the example in the first section that the ordinaryMethod function is not directly inside the classdef block but is inside a methods block inside the classdef block.

Functions that you want to be local to the class (class-related functions) can be after the end matching the classdef keyword, but they cannot be called from outside the class even if you try calling them on an instance of the class. See the myUtilityFcn function later on that documentation page for an example.

[Hubert Skiba]

Thank You!

I have one more question. It looks like the function works now but there is another problem with my main script.

Error massage:

Error using MetData3

Too many input arguments.

Error in test (line 15)

MyData(k)= MetData3(loc,Ws);

Code:

clear; clc; format short g;
dane = dir('Dane'); dane = dane(3:end);
for k = 1:1:max(size(dane))
    
    a=horzcat('Dane/',dane(k).name);
    [id1,kom]=fopen(a);
    if(id1<0)
        disp(kom)
    end
    [A]=fscanf(id1,'%f %f',[46 8760]);
    fclose(id1);
    A=A';
    loc=dane(k).name;
    Ws= A(:, 8);
    MyData(k)= MetData3(loc,Ws);
end
clear A;

[Steven Lord]

The code you posted originally does not include a constructor. Therefore you get the Miranda constructor:

"MATLAB® classes that do not explicitly define any class constructors have a default constructor method. This method returns an object of the class that is created with no input arguments. A class can define a constructor method that overrides the default constructor. An explicitly defined constructor can accept input arguments, initialize property values, call other methods, and perform other operations necessary to create objects of the class."

If you want to be able to specify data to be used in constructing the object, you should add a constructor to your class. As the guidelines on that documentation page state, though, your constructor should also be able to handle creating an instance of the object with no input arguments (using default or "reasonable" values for the parameters.)