How to create 3D plot in Matlab? How to set up the Matrix of the points?

I have the following code that is using a matrix called "permutation" size 50x2 and feeds the first column value as "rollang" and the second column value as "pitchang" into equations to output the "distance" value. Currently, the corresponding three points are output into the pointsRPS matrix, size 80x3. When I go to surface plot, its completely wrong. Currently, it outputs like this:

X Y Z

30 0 600

40 0 450

50 0 360

...

But I need it to output like this with X values along the top and Y values alon the sie, with the Z point inside:

0 30 40 50

0 600 450 360

10 600 450 360

20 .... .... ...

i.e. the X values don't repeat and the Y values don't repeat.

AKA I want it to look like this but un matrix form in matlab...

#### CODE #########

pointsRPS = [];

for i =1:size(permutation, 1)

rollang = permutation(i,1);

rollTh = 30;

pitchTh = 30;

pitchang= permutation(i,2);

if rollang >= rollTh && pitchang >= pitchTh

distance = (((180/rollang) + (90/pitchang))/2)*100;

pointsRPS = [pointsRPS; rollang pitchang distance];

elseif rollang >= rollTh

distance = (180/rollang)*100;

pointsRPS = [pointsRPS ; rollang pitchang distance];

elseif pitchang >= pitchTh

distance = (90/pitchang)*100;

pointsRPS = [pointsRPS; rollang pitchang distance];

else

distance = 0;

end

end

disp(pointsRPS)

surfaceplotTest = surf(rollang, pitchang, pointsRPS)

title('Pitch and Roll Angle Surface Plot')

xlabel( 'Roll Angle')

ylabel('Pitch Angle')

zlabel('Distance')

Answer 1

[Ganesh Regoti]

meshgrid function will work for your case. I have presumed the data and tried the following code and it works fine.

permutation = randi(202,50,2);
a = sort(unique(permutation(:,1)));
b = sort(unique(permutation(:,2)));
 
[X,Y] = meshgrid(a,b);
 
pointsRPS = zeros(size(X)); %Create pointsRPS to store the distance 

for i =1:size(X, 1)
    for j = 1:size(X,2)
        rollang = X(i,j);
        rollTh = 30;
        pitchTh = 30;
        pitchang= Y(i,j);
            if rollang >= rollTh && pitchang >= pitchTh
               distance = (((180/rollang) + (90/pitchang))/2)*100;
               pointsRPS(i,j) = distance;
            elseif rollang >= rollTh
                distance = (180/rollang)*100;
                pointsRPS(i,j) = distance;
            elseif pitchang >= pitchTh
                distance = (90/pitchang)*100;
                pointsRPS(i,j) = distance;
            else
                    distance = 0;
                    pointsRPS(i,j) = distance;
            end  
    end
end 
 
surfaceplotTest = surf(X, Y, pointsRPS);
title('Pitch and Roll Angle Surface Plot')
xlabel( 'Roll Angle')
ylabel('Pitch Angle')
zlabel('Distance')