visualise fft plot in 3D
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Hi,
I want to plot all the fft plots in a single figure. something like the attached image
Here's my code
for i=1:m
[f(i,:) mag(i,:)]=fftplot(2000000,corr_amp(i,:));
subplot(3,4,i)
plot(f(i,:),mag(i,:))
axis([25000,85000,0,1.1]);
strtime = ['Frequency Spectrum at \delta=', num2str(load(1,i)),'\mum'];
title(strtime,'fontsize',10)
xlabel('Frequency (Hz)')
ylabel('Magnitude')
grid on
grid minor
end;
this code gives me all fft plots as separate plots in a single figure, but i want to arrange all the fft plots in 3D (third axes is 'load' variable in the .mat file attached) as shown in image to see the variation accurately.
采纳的回答
Star Strider
2017-4-4
The Code —
d = load('Athira Surendran sjs1.mat');
amp = d.amp'; % Amplitude (Transposed)
load = d.load; % Load
t = d.t; % Time
Ts = mean(diff(t)); % Sampling Interval
Fs = 1/Ts; % Sampling Frequency
Fn = Fs/2; % Nyquist Frequency
L = length(t);
FTamp = fft(amp)/L; % Fourier Transform
Fv = linspace(0, 1, fix(L/2)+1)*Fn; % Frequency Vector
Iv = 1:length(Fv); % Index Vector
figure(1)
hr = ribbon(Fv, abs(FTamp(Iv,:))*2, 0.1);
grid on
for k1 = 1:length(hr)
set(hr(k1), 'FaceColor','b', 'EdgeColor','b')
xpos = get(hr(k1), 'XData');
xtix(k1) = mean(xpos(1,:));
end
set(gca, 'XTick',xtix, 'XTickLabel',load)
xlabel('Load')
ylabel('Frequency (Hz)')
zlabel('Amplitude')
view([135, 30])
I believe that I chose the correct variables. If not, changing my code to use the correct ones is straightforward.
The Plot —
1 个评论
agung pratama
2020-8-15
编辑：agung pratama
2020-8-15
Can i transform a 3D surface that x,y,z axis in pixel into mm?
更多回答（1 个）
KSSV
2017-4-4
You may follow something like this:
x = linspace(0,2*pi) ;
N = 10 ;
pos = 1:N ;
figure
hold on
for i = 1:N
z = i*sin(x) ;
y = repmat(pos(i),size(x)) ;
plot3(x,y,z,'r');
end
view(3)
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