Simple 2D contour plots

   
navg = 11;
filenames = cell(navg,1);
for i = 1:navg
    filenames = sprintf('queen2_test_%d.dat', i);
    mydata{i} = importdata(filenames);
%     writematrix(avg_mat{i}, filenames{i});
    R = mydata{i}(:,1);%X
    C = mydata{i}(:,2);%Y
    F = mydata{i}(:,7);%F(X,Y)
    figure
    contour(R,C,repmat(F,1,numel(C))');%error line
    contourf(R, C, F)% error line
      end

Please help me to plot and save high quality contour plots for a sequence of files. I am attaching the code and the data files for your reference.

Answer 1

[KALYAN ACHARJYA]

Create the meshgrid of R,C,F then plot contour

https://www.mathworks.com/help/matlab/ref/contour.html

[MS]

Thanks. I have done it already. I got an error.

Error using contourf (line 57)

Z must be at least a 2x2 matrix.

would you mind to add a line?

[KALYAN ACHARJYA]

All must be 2D grid R,C,F

[MS]

actaully, i do not know it after reading it. Also, i wanted to save the high quality picture automatically. I request to add suitable code if possible.

[KALYAN ACHARJYA]

Is the contour in necessity? Plot3

[MS]

There is a way to plot the contour wthout the meshgrid. I want to plot the high quality contour and save it automatically. Can you help me to add simple correct code to serve my purpose?

[KALYAN ACHARJYA]

navg = 11;
filenames = cell(navg,1);
for i = 1:navg
    filenames = sprintf('queen2_test_%d.dat', i);
    mydata{i}=importdata(filenames);
%     writematrix(avg_mat{i}, filenames{i});
    R = mydata{i}(:,1);%X
    C = mydata{i}(:,2);%Y
    F = mydata{i}(:,7);%F(X,Y)
    figure
    plot3(R,C,repmat(F,1,numel(C))');
    grid on;
    saveas(gcf,[num2str(i),'.png']);
end

%Example of Saved image

[MS]

Thanks you very much for the help. I need to plot 2D contour plots. Can you take a look at it . Also, i want to save as individual 11 plots. I neea a contour plots as shown in the figure below.

[Ameer Hamza]

@MS, the image you posted is a quiver plot, not a contour plot? Which one do you want? Note that for the quiver plot, you will need 4 input variables instead of 3 needed for contour.