Data plots incorrectly when in Live Script, but shows up correctly when the same incorrect plot is popped out --why?
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I have a live script (.mlx file) that plots 2 cycles of a pulse train that has frequency and duty cycle as inputs. For some frequencies it is almost as if some of the interim points are not plotted, and instead only straight line between the end points are. However, the "intermediate" points are all there in the arrays I'm ploting, and in fact, when I pop the plot out, it the plot displays correctly. So, it appears to be a rendering issue within Live Script....
This is what I see in Live Script:
and this is what I get when I pop the plot out: (the correct waveform):
Here is my script to see if anyone can recreate what I´m seeing in Live Editor vs. "Matlab". It renders correctly on here as shown below (note: the plot below is full plot while above I only showed the first waveform plotted on the axis.)
R = 10; % these are sliders in the .mlx file [0:1:20]
D = 0.5; % [.1:.1:1]
f = 129000; % [1000:1000:10e6]
A = 5;
C = 0.047e-6;
tau = (R*C)
%tau_disp = ['RC Tau = ', num2eng(tau)];
%disp(tau_disp)
T= 1./f;
ton = T.*D;
toff = T.*(1-D);
t1= linspace(0,ton,100);
t2 = linspace(0,toff,100);
hi = repmat(A,1,size(t1,2));
lo = repmat(0,1,size(t2,2));
time = [t1 t1(end)+t2];
amp = [hi lo];
% plot 2 cycles
timetot= [time time(end)+time];
amp =[amp amp];
% debug
%fig1=figure();
%plot(timetot,amp,'-*k') % added * to see the point on the plot...
%hold on;
fig=figure();
hold on;
xlabel('time (secs)')
ylabel('amplitude (volts)')
title([{'Resulting Ave Value and';'Ripple as Function of DC and Freq'}])
plot(timetot,amp,'-k') % this plot is different in Live Script vs. Matlab at certain frequencies....
Amplitude = D*A;
x1 = A*(exp(-D.*T/tau)-1).*exp(T.*(D-1)/tau)./(-1+exp(-T/tau));
x2 = (exp(-D.*T/tau)-1)*A./(-1+exp(-T/tau));
plot(0,x1,'*k',t1,x1+(A-x1)*(1-exp(-t1/tau)),'-r')
plot(ton,x2,'*k',ton+t2,x2*exp(-t2/tau),'-r')
plot(T,x1,'*k',T+t1,x1+(A-x1)*(1-exp(-t1/tau)),'-r')
plot(T+ton,x2,'*k',T+ton+t2,x2*exp(-t2/tau),'-r')
plot(2*T,x1,'*k')
yline(Amplitude,'--b')
Ripple = (x2 - x1)./(A*D);
rip = sprintf('Ripple = %2.2f %%',Ripple*100);
disp(rip)
Ave = sprintf('Average Amplitude = %2.2f volts', Amplitude);
disp(Ave)
7 Comments
Cris LaPierre
on 8 Nov 2023
Interesting issue. I cannot duplicate. When I run the code on my desktop in R2023b, I get the same plot as what was generated by running the code in your post.
I it keeps happening after restarting, I suggest contacting support: https://www.mathworks.com/support/contact_us.html
Cris LaPierre
on 9 Nov 2023
Yes, I used the live editor. I just tested it again, and I get the desired result. What operating system are you using?
The only plotting functions you have in your code are plot and yline. Let's make sure you're calling the versions of those functions you think you're calling. What does this code show when run inside your Live Script and in the Command Window?
which -all plot
which -all yline
Since neither of the first two plots in your question have a horizontal line, I'm suspicious of yline.
Jorge
on 9 Nov 2023
Cris LaPierre
on 10 Nov 2023
I'd again suggest contacting support. Whatever is happening, this is something they'd like to know about anyway.
Jorge
on 10 Nov 2023
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on 10 Nov 2023
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