Matlab classes in a array

Question

I've a issue with matlab constructors when I try to instantiate an array of classes.

I get the following error:

??? The following error occurred converting from volta to double:
Error using ==> double
Conversion to double from volta is not possible.

Error in ==> circuito>circuito.iniciarNovaVolta at 37
            Circuito.Voltas(Circuito.Nvoltas) = Volta(Nmaxpiloto);

Error in ==> testes at 99
c1.iniciarNovaVolta(10);

And my code is:

function iniciarNovaVolta(Circuito, Nmaxpiloto)
            Circuito.Voltas(Circuito.Nvoltas) = Volta(Nmaxpiloto);
            Circuito.Nvoltas = Circuito.Nvoltas + 1;
end

The contructor at Volta class is:

function Volta=volta(Nmaxpiloto)            
    if(nargin>0)    
        %Volta.Melhortempovolta=Melhortempovolta;  
              Volta.Nmaxpiloto=Nmaxpiloto;                               
           end        
end

I had this issue more than once, but the types looks right. Could you tell me what I can't see ?

function Volta=volta(Nmaxpiloto) 
if(nargin>0)

Can you show more code? It would be nice to see the call to the function as well as the function you are trying to call. — Dusty Campbell
– Dusty Campbell, Commented Jan 11, 2012 at 23:11

O_O · Accepted Answer · 2012-01-12 01:22:16Z

1

Check your types. I'm guessing that Volta(Nmaxpiloto) is of type double and Circuito.Voltas(Circuito.Nvoltas) is of type volta. This can't be done. Sounds like you are mixing a lot of OOP with MATLAB, which is not to say that you can't. You might want to look at this link: http://www.mathworks.com/help/techdoc/matlab_prog/f2-47534.html#bqt_gwr to see the valid MATLAB classes.

answered Jan 12, 2012 at 1:22

O_O

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1 Comment

user682711 Over a year ago

Hi again! The contructor at Volta class is: {function Volta=volta(Nmaxpiloto) if(nargin>0) %Volta.Melhortempovolta=Melhortempovolta; Volta.Nmaxpiloto=Nmaxpiloto; end end } I had this issue more than once, but the types looks right. Could you tell me what I can't see ? function Volta=volta(Nmaxpiloto) if(nargin>0)

user682711 · Accepted Answer · 2012-01-12 12:42:04Z

0

The contructor at Volta class is:

function Volta=volta(Nmaxpiloto)            
    if(nargin>0)    
        %Volta.Melhortempovolta=Melhortempovolta;  
              Volta.Nmaxpiloto=Nmaxpiloto;                               
           end        
end

I had this issue more than once, but the types looks right. Could you tell me what I can't see ?

function Volta=volta(Nmaxpiloto) 
if(nargin>0)

answered Jan 12, 2012 at 12:42

user682711

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