Undefined function 's' for input arguments of type 'double'

Hello, I am writing class and my methods. And I've got trouble calling the function r. When I write:

• obj = BasicClass;
• obj.Value = 1;

for example. And then I want to call the function by:

• answer = x(obj)

I got warning: Undefined function 's' for input arguments of type 'double'. Any ideas how could I repair it to achieve this reference in the function x? A reference that calls two other functions in the third one?

classdef BasicClass
   properties
      Value
   end
   methods   
       function [Result] = r (myobj) 
         Result = recurseComputeR(myobj.Value);
       end
       function [eindruck] = s (myobj)
           eindruck = ComputeS(myobj.Value);
       end
       function [deltaf] = x (myobj)
           deltaf = ComputeDeltaF(myobj.Value);
       end
   end
end

function deltaf = ComputeDeltaF(myobj)
deltaf = 0.0001 * (1000000000*s(myobj)[phone]*r(myobj));
end

function eindruck = ComputeS(myobjValue)
eindruck = myobjValue*0.000001;
end

function Result = recurseComputeR(myobjValue)
if myobjValue > 0
  Result = recurseComputeR(myobjValue-1)*1000+2/1000000000000;
else
  Result = 2/1000000000000;
end
end

Thank You very much in advance :)

Answer 1

[Henry Giddens]

Your function computeDeltaF expects the object as the input, not the property value

Change the following line:

         function [deltaf] = x (myobj)
             deltaf = ComputeDeltaF(myobj); 
         end

Answer 2

[Steven Lord]

A method of a class must accept an instance of the class as one of its inputs, unless it's a Static method. A class function, defined after the classdef block but in the same file, can accept an instance of the class but more commonly accepts just some data.

If a function needs to call a method on an instance of the class, the function probably should be a public method (if you need/want it to be accessible by code outside the class definition), a private method (if it doesn't need to be accessible by code outside the class definition), or a class function that accepts an instance of the object.

So let's look at the functions associated with your class.

function [Result] = r (myobj) 
  Result = recurseComputeR(myobj.Value);
end

Accepts an instance of the class, intended to be called by users of your class. Currently defined as a method, which I feel is correct.

function [eindruck] = s (myobj)
  eindruck = ComputeS(myobj.Value);
end

Ditto what I said for your r method.

function [deltaf] = x (myobj)
  deltaf = ComputeDeltaF(myobj.Value);
end

Ditto what I said for r and s.

function deltaf = ComputeDeltaF(myobj)
  deltaf = 0.0001 * (1000000000*s(myobj)[phone]*r(myobj));
end

Currently defined as a class function. This calls methods on the class itself (s and r). I would make this either a private method or a class function into which you pass the object, not just one of the object's properties. Search the documentation for "class attributes" to learn how to make this into a private method if that's the approach you choose.

function eindruck = ComputeS(myobjValue)
  eindruck = myobjValue*0.000001;
end

Currently defined as a class function. This only needs the value of one of the object's properties, so it seems appropriate as a class function.

function Result = recurseComputeR(myobjValue)
  if myobjValue > 0
    Result = recurseComputeR(myobjValue-1)*1000+2/1000000000000;
  else
    Result = 2/1000000000000;
  end
end

Currently defined as a class function. Doesn't need to use the object, just one of its property values that is passed into it by its caller. Appropriate as a class function.

Answer 3

[swati paliwal]

vrxmf=zeros(rowmx,6); rowmx=1000; nrow=1; %...............printing in to file............. for n1=1:nrow-1; fid1=fopen('C:\Users\hp\Documents\MATLAB\ss1.dat'); fopen(fid1); fprintf(fid1,'%10.6f\t%10.6f\t%10.6f\t%7.4e\t%10.6f\t%10.6f\t\n',...... vrxmf1(n1,1),vrxmf1(n1,2), vrxmf1(n1,3), vrxmf1(n1,4), vrxmf1(n1,5),vrxmf1(n1,6));

Undefined function 'vrxmf1' for input arguments of type 'double'. Error in newton>fit_fun (line 435) fprintf(fid1,'%10.6f\t%10.6f\t%10.6f\t%7.4e\t%10.6f\t%10.6f\t\n',...... vrxmf1(n1,1),vrxmf1(n1,2), vrxmf1(n1,3), vrxmf1(n1,4), vrxmf1(n1,5),vrxmf1(n1,6)); How can i eliminate this error

[Madhusudan Kulkarni]

create your own thread for same problem. Many people may see and answer. Type program properly. No end statement in given program.