CODEWITHSUNDEEP
matlabplotoverlay
Raksha
Raksha

Reputation: 1699

How to display 3D and 2D plots on top of each other?

Namely, a spectrogram, and another plot.

N = 1000000;
win = 3125;                                
no = floor(win/2);                        
nfft = floor(log2(N));
fs = 31250;                          
data = pm_data.ch4(1:N);
Fr = 20:10:5000;
t = 1/fs:1/fs:N/fs;
spectrogram(data,hann(win),no,Fr,fs,'yaxis');
colorbar;
set(gca,'Yscale','log')
plot(t,ai_data.ch1(1:N))

I tried putting "hold on" before spectrogram, but it didn't work :\

Upvotes: 0

Views: 455

Answers (1)

user3717023
user3717023

Reputation:

For two plots to be combined, they must have the same axes. So, the 2D curve you'd be plotting with plot should be put in 3D space by plot3, as excaza suggested. Here is a simple example: a parabola on a paraboloid. I use zeros for y-coordinate in plot3, and a thick line with contrasting color to set it aside from the surface.

x = -1:0.1:1;
[X,Y] = meshgrid(x, x);
surf(X, Y, X.^2-Y.^2)
hold on 
plot3(x, zeros(size(x)), x.^2, 'k', 'linewidth', 5)
hold off

paraboloid

Upvotes: 3

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