colorbar problem in surf plot?

I want to plot 3D graph using 3 parameters but there is error in plotting colorbar. Matrix size of parameters and code to plot graph is as follow:

Tx_power =0:2:40;           1*21 Matrix size
Position =1:21;               1*21 Matrix size
F_cap = 21*21;                   Matrix size
C= Tx_power.* Position;
figure;
surf(Tx_power,Position,F_cap, C);
colorbar;

Error is:

Colorbar is not ploting and if i remove colorbar, it is working fine. And if colobar is ploting then, it is not ploting graph(i.e. F_cap parameter).

Please help

Answer 1

[Simon Chan]

I guess the code should be like that:

Tx_power =0:2:40;           %1*21 Matrix size
Position =1:21;               %1*21 Matrix size
%F_cap = 21*21;                  % Matrix size (Not use)

[X,Y]=meshgrid(1:21,1:21);      % Make a grid with size 21x21
C= Tx_power(X).*Position(Y);    % Calculate C which in 2D, previous is 1D only
figure;
surf(Tx_power,Position, C); 
colorbar;

[SANDEEP SINGH RANA]

Thanks Simon Chan,

But graph has 3 Dimensions.

F_cap is there as the 3 dimensions and colorbar should represent the range of values of F_cap using different color. ( In this figure, colorbar range is from 0 to 800 but in my graph plot, F_cap range is from 1 * 10^8 to 3*10^8).

Colorbar should specify ranges of F_cap. But it showing fixed range from 0 to 800 irrespective of range of 3 Dimension.

I tried below code: [it working but problem is with colorbar range and rotation]

[tp,t] = meshgrid(0:2:40,1:21);

surf(tp,t,F_cap,C);

xlabel('Tx_power (dBm)')

ylabel('simulated positions')

zlabel('Throughput in (MBps)');

colorbar;

Can you also help me in rotating graph to anti-clockwise direction so that Tx_power came in horizontal direction, Position in vertical direction and F_cap in upward direction ?

[Simon Chan]

Try the following, hope this is what you want.

[t,tp] = meshgrid(1:21,0:2:40);             % (Edit) Added this line after switching between x & y
surf(t,tp,F_cap);
ylabel('Tx_power (dBm)')
xlabel('simulated positions')
zlabel('Throughput in (MBps)');
colorbar;