help on min, max, meshgrid functions to plot MED boundary in pattern recognition

What is the relationship of using min, max and meshgrid functions to plot the MED contour of two classes. I hope my question is clear...... thanks

%%Computing the classifiers
step = 0.2; % The lower this is the smoother the contours.
x = min([samples_a(:,1);samples_b(:,1)])-1:step:max([samples_a(:,1);samples_b(:,1)])+1;
y = min([samples_a(:,2);samples_b(:,2)])-1:step:max([samples_a(:,2);samples_b(:,2)])+1;
[X1, Y1] = meshgrid(x,y);

x = min([samples_c(:,1);samples_d(:,1);samples_e(:,1)])-1:step:max([samples_c(:,1);samples_d(:,1);samples_e(:,1)])+1;
y = min([samples_c(:,2);samples_d(:,2);samples_e(:,2)])-1:step:max([samples_c(:,2);samples_d(:,2);samples_e(:,2)])+1;
[X2, Y2] = meshgrid(x,y);

% Plotting the MED boundaries
contour(X1,Y1,MED1, [0, 0], 'Color', 'magenta', 'LineWidth', LINE_WIDTH);

[Image Analyst]

No idea. What is the "MED" contour? What are samples_*? You forgot to attach them. Where is pattern recognition taking place in your code?

Try this helpful link