Discontinuous display in Simulink Scope

Hi, I am running a simulink model, however, some of the signals are not displayed properly in the Scope. They are discontinuous in the scope, but if I export the data to workspace and plot them, they are continuous. Anyone knows how to solve this issue? Thank you.

I have checked the limit data points option and simulation period in the scope settings.

Answer 1

[VBBV]

Select the plot type as Auto in scope block. This plots the graph as continuous signals instead of discrete ones which you have.

[VBBV]

https://in.mathworks.com/help/simulink/slref/scope.html

[Ximeng Wu]

Hi, thanks for you reply. I just checked and It is already set as "Auto" for plot type.

[VBBV]

It seems there is some change in Marker and LineStyle properties in the plot options. Deselect Marker and set to none

[Ximeng Wu]

Hi, I have tried but nothing changed. You can see without marker, the signals are still discontinuous

[VBBV]

ok, May be you're using Floating scope instead of Scope . There may be some NaN values in the signal. If there are NaN values, Scope wont display them. Can you check if signal has NaN values after exporting to data file.

[Ximeng Wu]

Hi, I have checked the output data, there is no NaN values.

[Ximeng Wu]

I have checked my scope too, they are not floating scope.

[VBBV]

try with a low Quanization period, or adjust the sampling rate of the signal to get a continuous line.

[Ximeng Wu]

Thank you, it seems it is not caused by using a low sampling rate. I used 2500Hz in my simulation.

[VBBV]

Then it is likely that you're using faulty Simulink version

[VBBV]

After changing Marker , u could see some continuity of plot as lines and dashed lines but after some time it becomes discontinuous. Observe carefully the first few time seconds they are continuous.

[Ximeng Wu]

Thanks for your reply. I found the reason, it seems it is caused by different sampling time settings for different subsystems, if I use the scope inside the subsystem, it is discontinuous, if I output the signal and use the scope outside the subsystem, it is continuous. For now, I have this solution.