3-D view of a waveform

I have used the DFT to decompose the waveform into its components and have used 'plot3' to display the in a 3-D image. The image can be rotated in MATLAB to examine the frequency domain as well as the time domain. The second figure shows the figure rotated.

N=128;n=0:N-1;fund=3/N;%0+.0167/2;
x=sin(2*pi*fund*n)+sin(2*3*pi*fund*n)/3+...
sin(2*pi*5*fund*n)/5+sin(2*pi*7*fund*n)/7;
%x=x.*(hamming(N))';
DFT3D_1(x)

function DFT3D_1(x)
N=length(x);
n=0:N-1;
%x=x.*(hamming(N))';
X=fft(x)*2/N;
X1=abs(X')*ones(1,N);X1=X1';

f=(0:N-1)/N; % Harmonics
[ff,nn]=meshgrid(f,n);
W=cos(2*pi*f'*n);

X1=W'.*X1;
X1(:,1)=x;

plot3(ff,nn,X1,'LineWidth',1);grid on

xlabel('frequency');
ylabel('time seconds');
axis([0 1 0 N -1.3 1.3]);
    view([37.5 30])