The class has no property or method named 'setCurncy'

Question

Christof 2012-6-7

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回答： Tim Szostakowski 2018-7-17

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Hi. I have the following class. when I try to create an instance of that class

c=cBasket('aaa')

I get the following error message The class cBasket has no property or method named 'setCurncy'.

why does matlab not see the method setCurncy? Thanks, Chris

classdef cBasket
    properties
        curncy
    end
    methods
        %%constructor
        function obj = cBasket(symbol,date)
            assert(nargin>0,'no symbol given');
            if ~exist('date','var');  
                date=datestr(now,'yyyy-mm-dd'); 
            end
            obj.name = symbol;
            obj.timestamp=date;
            obj.curncy = cBasket.setCurncy(symbol);
        end
        %%methods getCurncy
        function obj = setCurncy(symbol)
            obj = 'xxx';
        end % getCurncy
    end
end

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Sean de Wolski 2012-6-7

what does:

methods(c)

return?

Christof 2012-6-7

if I comment the line obj.curncy = cBasket.setCurncy(symbol) so that I can create an instance, then methods(c) shows cBasket and setCurncy

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Answer 1

Honglei Chen 2012-6-7

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It is not a static method, so I think you should use

obj.curncy = obj.setCurncy(symbol);

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Christof 2012-6-8

thanks a lot. that made matlab find the method. however, it behaves pretty strange. if I use the variable symbol in the method it passes on the class cBasket to the method. So the instance looks like

Properties:

name: 'a'

timestamp: '2012-06-08'

curncy: [1x1 cBasket]

%% constructor

function obj = cBasket(symbol,date)

assert(nargin>0,'no symbol given');

if ~exist('date','var'); date=datestr(now,'yyyy-mm-dd'); end;

obj.name = symbol;

obj.timestamp=date;

obj.curncy = cBasket.setCurncy(symbol);

end

%% methods getCurncy

function obj = setCurncy(symbol)

obj = symbol

end; % getCurncy

Honglei Chen 2012-6-8

I'm not sure what you are trying to do, but I think you mean

function obj = setCurncy(obj,symbol)

obj.name = symbol;

end

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Answer 2

Tim Szostakowski 2018-7-17

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/40552-the-class-has-no-property-or-method-named-setcurncy#answer_329117

在 MATLAB Online 中打开

You can make your function Static, if you write "methods(Static)" in your methods definition:

classdef cBasket
    properties
        curncy
    end
    methods(Static) %%<<<<<<<<< HERE!!
        %%constructor
        function obj = cBasket(symbol,date)
            assert(nargin>0,'no symbol given');
            if ~exist('date','var');  
                date=datestr(now,'yyyy-mm-dd'); 
            end
            obj.name = symbol;
            obj.timestamp=date;
            obj.curncy = cBasket.setCurncy(symbol);
        end
        %%methods getCurncy
        function obj = setCurncy(symbol)
            obj = 'xxx';
        end % getCurncy
    end
end