MATLAB: Simple 2D contour plots

Question

   
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

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

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