The class has no property or method named 'setCurncy'

6 次查看（过去 30 天）
Christof
Christof 2012-6-7
回答： Tim Szostakowski 2018-7-17
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
  2 个评论
Christof
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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回答（2 个）

Honglei Chen
Honglei Chen 2012-6-7
It is not a static method, so I think you should use
obj.curncy = obj.setCurncy(symbol);
  2 个评论
Christof
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
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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Tim Szostakowski
Tim Szostakowski 2018-7-17
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

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