why do I receive error "Not enough Argument"

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KEYVAN PEBDANI SAHRAEI 2020-11-6

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/638010-why-do-i-receive-error-not-enough-argument

评论： KEYVAN PEBDANI SAHRAEI 2020-12-13

Hello

I am writting codes to a s-function block to create demo or animate of a liquid Tank ,but I have a problem which is "not enough Arguments".I am not sure if you know what is the problem,I have paste my written codes below.

Thank you

function [sys,x0,str,ts,setPt1,setPt2,waterx1,vessel1Hndl,vessel1Ht, vesselHndlList,waterY1,vessel2Hndl,lineHndl1,lineHndl2]=vesseldemo2project (u,flag,t,x)
switch flag==4
     
    case 0
     [sys,x0,str,ts,vesseldemo2project]=mdlInitializeSizes;
      
     get(vesseldemo2project,'UserData') =vesselHndlList; 
            get( vesselHndlList(1),'YData');
           yData(1)=yOffset;
            yData(3:4)=[1 1]*u(2)+yOffset;
            set( vesselHndlList(1),'YData',yData);
            
            yData=get(x(2),'YData');
            yData([3 4])=[1 1]*u(2)+yOffset;
            set(x(2),'YData',yData);
            
            yData=[1 1]*u(1)+1;
            set(x(3),'YData',yData);      
    case 2 
  
         %Tank body details.................................
         sys=mdlUpdate(t,x,u);
         vessel1Ht=1;
        vessel1Wid=1;
        vessel1Init=0;
         setPt1=0.5;
         setPt2=0.75;
        vesselx=[0 0 1 1]-0.5;
         vesselY=[1 0 0 1];
   
    line(1.1*vesselx*vessel1Wid+1,vesselY*vessel1Ht+0.95,'LineWidth',2,'Color','black');
    
 % Draw the water..............................................
   waterx1=vesselx*vessel1Wid+1;
    waterx=vesselY*vessel1Init+1;
         x=patch(waterx,waterx,'blue','EdgeColor','none');
 
   % Draw the gray wall............................................
        waterY1([1 2 5])=vessel1Ht*[1 1 1]+1;
      waterY([3 4 ])=x*[1 1 ]+1;
    vessel2Hndl=patch(waterx,waterY,[.9 .9 .9],'EdgeColor','none');
    
 case 3
   
str = [];
ts  = [.1 0];
vessel1Wid=1;
    vessel1Ht=1;
     vessel1Init=0;
       setPt1=0.5;
       setPt2=0.75;
     vesselx=[0 0 1 1]-0.5;
  vesselY=[1 0 0 1];
   waterx1=vesselx*vessel1Wid+1;
     waterx=vesselY*vessel1Init+1;
      waterY1([1 2 5])=vessel1Ht*[1 1 1]+1;
       waterY([3 4 ])=vessel1Init*[1 1 ]+1;
        vessel1Hndl=patch(waterx,waterx,'blue','EdgeColor','none');
         vessel2Hndl=patch(waterx,waterY,[.9 .9 .9],'EdgeColor','none');
         lineHndl1=line([0 0.4],setPt1*[0.5 0.5]+1,'Color','red','LineWidth',4);
         hlod on
        lineHndl2=line([0 0.4],setPt2*[0.75 0.75]+1,'Color','red','LineWidth',4);
        hold on
       set(gcf, ... 
     'Color',[.9 .9 .9], ...
   'UserData',[vessel1Hndl vessel2Hndl lineHndl]);
   
   set(gca, ...
  'XLim',[0 2],'YLim',[0 3.5], ...
  'XColor','black','YColor','black', ...
  'Box','on');
axis equal
    
    xlabel('Water Level Control','Color','black','FontSize',10);
     set(get(gca,'XLabel'),'Visible','on');
 
   x0=0; 
  otherwise
    error(message('vesseldemo:vesseldemo2project:UnhandledFlag', flag));
    
     
 end

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Piyush Aggarwal 2020-11-9

"Not enough arguments" error is simply an indicative of the fact that you are calling some MATLAB/user-defined function with the wrong syntactical signature. You will need to pass correct number of inputs arguments to any function. Look closely at the exact error message you are recieving. It will tell you which line and which function is causing the trouble.

KEYVAN PEBDANI SAHRAEI 2020-11-9

There is not any error in command lines but at the end I have the problem. Thank you for advicing.

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Answer 1

Walter Roberson 2020-12-13

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/638010-why-do-i-receive-error-not-enough-argument#answer_574050

Note: you are using a Level 1 S-Function inside of Simulink

https://www.mathworks.com/help/simulink/sfg/maintaining-level-1-matlab-s-functions.html

get(vesseldemo2project,'UserData') =vesselHndlList;

That attempts to assign a value to an array named get indexed at integer locations indicated by vesseldemo2project and the offsets calculated by converting the character vector 'UserData' into character codes. This is not at all likely to be what you want.

More likely would be

vesselHndlList = get(vesseldemo2project,'UserData');

If this is not enough to fix the problem, you will need to post more of the error message, showing which line it is complaining about.

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Walter Roberson 2020-12-13

The file is intended to be called from Simulink by configuring it through an S-Function Block. If you call it at the MATLAB level, you need to pass in at least four variables (possibly 5 for that code). The four major ones are documented at the link I posted at the top of my Answer.

KEYVAN PEBDANI SAHRAEI 2020-12-13