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

Question

T.Mariah Khayat 2019-10-16

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/485722-create-a-plot-in-uiaxes-from-a-table-using-matlab-app-designer

回答： Himanshu Jain 2021-8-24

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.

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T.Mariah Khayat 2019-10-16

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

T.Mariah Khayat 2019-10-16

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?

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Answer 1

Himanshu Jain 2021-8-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/485722-create-a-plot-in-uiaxes-from-a-table-using-matlab-app-designer#answer_773204

在 MATLAB Online 中打开

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