How to move the position of 2D projection of a 3D plot along the Z axis of the same figure?

Hello Everyone,

I am trying to plot the 2D projection of a 3D plot beneath the 3D plot . That is, I want the projection of the 3D plot in the xy plane inthe same figure. I am using surf plot for the 3D plot and contourf for the 2D projection. I am having trouble moving the 2D projection along the z axis. In mycode it is at z=0, but I want it to be at the bottom of z axis.

The code is

clc
clear
close all

f=13.56e6;                                    % Fundamental Frequency
T=1/f;                                        % Fundamental Period
omega=2*180*f;
t=0:T*.0001:T;


%************************Triple Fequency Case****************%

k=3;                                             % Number of consecutive Harmonics
Total_Applied_Voltage=300;
V0=(2*Total_Applied_Voltage)/(k+1);

V=nan(1,k);
Omega=nan(1,k);
V_rf=0;

for n=1:1:k

    V(n)=V0*(k-n+1)/(k);
    Omega(n)=n*omega;

end

discharge_symmetry=1;
theta1=0:5:360;
theta2=0:5:360;
Dc_Self_Bias = nan(length(theta1), length(theta2));

for x=1:1:length(theta1)
    for y=1:1:length(theta2)

        Vrf=V(1)*cosd(Omega(1)*t+theta1(x))+V(2)*cosd(Omega(2)*t+theta2(y))+V(3)*cosd(Omega(3)*t);
        Dc_Self_Bias(x,y)=-(((max(Vrf)+(discharge_symmetry*min(Vrf)))/(1+discharge_symmetry))/Total_Applied_Voltage)*100;

    end
end


surf(theta1, theta2, Dc_Self_Bias)
colormap("hsv");
colorbar

xlabel(['\theta_1 ',char(176),''])
ylabel(['\theta_2 ',char(176),''])
zlabel('Dc Self Bias %')
title('Discharge Characteristics')


xlim([min(theta1), max(theta1)])
ylim([min(theta2), max(theta2)])
zlim([min(min(Dc_Self_Bias)), 70])
xticks(min(theta1):30:max(theta1))
yticks(min(theta2):30:max(theta2))
pbaspect([1 1 1])
grid on
grid minor


hold on

contourf(theta1, theta2, Dc_Self_Bias);
colormap("parula");

This is the figure I am getting.

This is the figure I want

Can anyone help me out please? Also whats that colormap that they have used?

Thank you.

Answer 1

[Star Strider]

Use surfc instead of surf, and then make appropriate changes to 'ZLocation' and 'FaceColor' in the contour part of the plot.

Try this —

% clc
% clear
% close all

f=13.56e6;                                    % Fundamental Frequency
T=1/f;                                        % Fundamental Period
omega=2*180*f;
t=0:T*.0001:T;


%************************Triple Fequency Case****************%

k=3;                                             % Number of consecutive Harmonics
Total_Applied_Voltage=300;
V0=(2*Total_Applied_Voltage)/(k+1);

V=nan(1,k);
Omega=nan(1,k);
V_rf=0;

for n=1:1:k

    V(n)=V0*(k-n+1)/(k);
    Omega(n)=n*omega;

end

discharge_symmetry=1;
theta1=0:5:360;
theta2=0:5:360;
Dc_Self_Bias = nan(length(theta1), length(theta2));

for x=1:1:length(theta1)
    for y=1:1:length(theta2)

        Vrf=V(1)*cosd(Omega(1)*t+theta1(x))+V(2)*cosd(Omega(2)*t+theta2(y))+V(3)*cosd(Omega(3)*t);
        Dc_Self_Bias(x,y)=-(((max(Vrf)+(discharge_symmetry*min(Vrf)))/(1+discharge_symmetry))/Total_Applied_Voltage)*100;

    end
end

figure
hsc = surfc(theta1, theta2, Dc_Self_Bias);
% hsc(1).EdgeColor = [1 1 1]*0.8;
hsc(1).EdgeColor = 'interp';                        % Surface Plot
hsc(2).ZLocation = 'zmin';                          % Contour Plot
hsc(2).FaceColor = 'flat';
% colormap("hsv");
colormap(turbo)
colorbar

xlabel(['\theta_1 ',char(176),''])
ylabel(['\theta_2 ',char(176),''])
zlabel('Dc Self Bias %')
title('Discharge Characteristics')


xlim([min(theta1), max(theta1)])
ylim([min(theta2), max(theta2)])
zlim([min(min(Dc_Self_Bias)), 70])
xticks(min(theta1):30:max(theta1))
yticks(min(theta2):30:max(theta2))
pbaspect([1 1 1])
grid on
grid minor

The ability to change the level of the contour plot was introduced recently. I believe it is available in R2023b. You can set it anywhere you want, within the limits of the z-axis.

See Contour Properties to make appropriate changes to the contour plot.

.

[Md. Golam Zakaria]

@Star Strider Thank you very much

[Star Strider]

As always, my pleasure!