Plot line type not displaying as desired .

I desire to create a plot with lines running through circular markers. For some reason, this does not plot as desired, but is registered correctly in the legend. I made an attempt with 'dummy variables ', whose limits were based on the limits of the actual variables I am working with, and that worked perfectly. Why does the plot not display as desired? A solution for this would be most appreciated. Attached is the script used.

% actual variables to be plotted
kf_max_SW_A =  [ 0.0013    0.0049    0.0010    0.0011    0.0005    0.0007 ; 
                0.9845    1.0853    0.9962    0.9738    0.9454    0.9178 ]  ;
Id_A = [ 51.6400   29.2000   61.3600   63.5000   77.2100   76.1200  ]  ; 

%  dummy var xxx & yyy
xxx = linspace(20, 80, 5) ; 
yyy = linspace(0*1e-3, 5*1e-3, 5)  ; 

% Plotting variables
 figure(1)
 clf
        % the required plot
       plot( Id_A(1,1), kf_max_SW_A(1,1) , '-ok', 'LineWidth', 0.5, 'MarkerSize',5 , 'DisplayName', 'Max')
       hold on ; 
       for i = 2 : length( kf_max_SW_A) 
       plot( Id_A(1,i), kf_max_SW_A(1,i) , '-ok', 'LineWidth', 0.5, 'MarkerSize',5 , 'HandleVisibility','off')
       hold on ;   
       end 
       
        % the dummy plot
       plot(xxx, yyy,'-or' ) ;   hold off;    
       
    title(' Why do the variables for legend item Max not plot as desired ?')
    xlabel('x-axis') 
    ylabel('y-axis') 
    legend('show');
    legend('location','best') ;

Answer 1

[Simon Chan]

Try the following to sort the x-axis in correct order:

figure(1)
clf
[sort_Id_A,idx] = sort(Id_A);
sort_kf_max_SW_A = kf_max_SW_A(1,idx);
plot(sort_Id_A, sort_kf_max_SW_A , '-ok', 'LineWidth', 0.5, 'MarkerSize',5 , 'DisplayName', 'Max')
title('Is this your desired plot?')
xlabel('x-axis') 
ylabel('y-axis') 
legend('show');
legend('location','best') ;

[Eric Geraldo De-Lima]

Thank you Simon. Your approach works perfectly for my purpose .

I just found a post with a somewhat similar issue as mine in which a contributor explained how the plot function behaves. That, " If you want to plot a line, the data need to be a single input to plot function instead of using a for loop, which would only plot your data points as individual points. " : My plot is not showing a line? Why? - (mathworks.com). It seems that's why my plot did not display as desired, and why your script gives the desired result.

Happy new year .