# Stacked plot /waterfall plots to visulaise figures

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Ramesh Bala on 10 Sep 2021
Commented: Ramesh Bala on 13 Sep 2021
I have in total 6 signals and would like to see all in a single plot.Since all having same X axis and Y axis (shall normalise it).
How shall I see all in a single waterfall plot?
t=[0:.01:6]*1e-5;
e=zeros(length(t),6);
e(200:end,1)=12.5*cos(1.3e6*t(200:end) ).*(sin((t(200:end)-2e-5)*7.8e4)).^2;
e(200:end,2)=11.8*cos(1.3e6*t(200:end)+pi/2).*(sin((t(200:end)-2e-5)*7.8e4)).^2;
e(200:end,3)= 8*cos(1.3e6*t(200:end)-pi/2).*(sin((t(200:end)-2e-5)*7.8e4)).^2;
e(200:end,4)= 6.2*cos(1.3e6*t(200:end)+pi ).*(sin((t(200:end)-2e-5)*7.8e4)).^2;
e(200:end,5)= 7.2*cos(1.3e6*t(200:end)+pi/3).*(sin((t(200:end)-2e-5)*7.8e4)).^2;
e(200:end,6)= 8.2*cos(1.3e6*t(200:end)-pi/3).*(sin((t(200:end)-2e-5)*7.8e4)).^2;
%combined plot
plot(t,e(:,1),'r-',t,e(:,2),'g-',t,e(:,3),'b-',t,e(:,4),'c-',t,e(:,5),'m-',t,e(:,6),'y-');
xlabel('Time (s)'); ylabel('Strain');
legend('5','10','20','30','40','50');

Dave B on 10 Sep 2021
Edited: Dave B on 10 Sep 2021
If you want to put these data into a waterfall, you can do waterfall(e') but that won't get your time axis correct. Using meshgrid is an easy way to get x and y values in the right shape for waterfall (or mesh)
t=[0:.01:6]*1e-5;
e=zeros(length(t),6);
e(200:end,1)=12.5*cos(1.3e6*t(200:end) ).*(sin((t(200:end)-2e-5)*7.8e4)).^2;
e(200:end,2)=11.8*cos(1.3e6*t(200:end)+pi/2).*(sin((t(200:end)-2e-5)*7.8e4)).^2;
e(200:end,3)= 8*cos(1.3e6*t(200:end)-pi/2).*(sin((t(200:end)-2e-5)*7.8e4)).^2;
e(200:end,4)= 6.2*cos(1.3e6*t(200:end)+pi ).*(sin((t(200:end)-2e-5)*7.8e4)).^2;
e(200:end,5)= 7.2*cos(1.3e6*t(200:end)+pi/3).*(sin((t(200:end)-2e-5)*7.8e4)).^2;
e(200:end,6)= 8.2*cos(1.3e6*t(200:end)-pi/3).*(sin((t(200:end)-2e-5)*7.8e4)).^2;
n = [5 10 20 30 40 50]; % guessing from legend
[xi,yi] = meshgrid(t,n);
waterfall(xi,yi,e')
Ramesh Bala on 13 Sep 2021
Thanks Dave

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