Create a plot in UIAxes from a table using MATLAB App Designer

I'm trying to create a plot using the data from two colums in a table in the interface, as the following:

            func = (app.EditField.Value);
            a = (app.EditField_2.Value);
            b = (app.EditField_3.Value);
            n = (app.EditField_4.Value);
            tol = (app.EditField_5.Value);
       
           
            
            num = 0;
            
          
            while (num < n)
                 fx = 2*tol;
                if (abs(fx) > tol)
                num = num + 1;
                x = a;
                fa = eval(func);
                x = (a+b)/2;
                fx = eval(func);
               
                if (sign(fx) == sign(fa))
                    a = x;
                    
                    vars = {num2str(num), num2str(a),num2str(b),num2str(x), num2str(fx)};
                  app.UITable.Data = [app.UITable.Data; vars];
               
                    
                else 
                    b = x;
                    
                 vars = {num2str(num), num2str(a),num2str(b),num2str(x), num2str(fx)};
                app.UITable.Data = [app.UITable.Data; vars];
                
                end
                end
            end
       
           
      t = app.UITable.Data;
       middle = t(:, 4);
       fmiddle = t(:, 5);
      plot(app.UIAxes, middle, fmiddle); 

I can not see any errors in plot function, I mean all the arguements are set correctly, but I keep getting the error: 'Not enough arguments'! What is missing in the syntax of plot function? I have reviewed the documentation and everything was correctly added.

[Ni2]

Can you include screenshots of your app and codes

[T.Mariah Khayat]

The code is listed above in the question, it is only the solve button function.

[T.Mariah Khayat]

May it is the way I'm getting the values from the columns?

Cause the plot function is working fine, for exmaple I can plot:

   x = 0:0.02:2*pi;
   y = sin(x);
   plot(app.UIAxes, x, y);

and I see the plot on UIAxis.

But why not on the values of the table? do I have to change the x and y ticks? or what is the problem? What are the missing arguments?

Answer 1

[Himanshu Jain]

When you extract data from the UITable, it is returned in the table data structure. And when you extract any column from this table the also it is returned as a single column table.

Plot accepts data in the array format, that is why you are getting the error.

So you can replace

middle = t(:, 4);
fmiddle = t(:, 5);

with

middle = t{:, 4};
fmiddle = t{:, 5};

Now the 'middle' and 'fmiddle' will contain the data in the array format and it will plotted in the UIPlot.