Code Error When Trying to Plot Scope to Matlab Graph

5 次查看（过去 30 天）
Kassandra Krinke
Kassandra Krinke 2020-3-14
评论： Kassandra Krinke 2020-3-18
What would cause the code "plot(ScopeData.time,ScopeData.signals.values,'or')" to have an error and how to fix it. This is my code:
x0 = -1;
A = -2;
B = 1;
C = 1;
D = 0;
t = linspace(0,10);
u = 2 +3*sin(3*t);
[y,~]=lsim(A,B,C,D,u,t,x0);
plot(t,y);
hold on
plot(ScopeData.time,ScopeData.signals.values,'or');
xlabel('time(s)');
ylabel('x(t)');
legend('lsim','simulink','Location','northwest');
This is my Simulink
  4 个评论
显示 2更早的评论
Aghamarsh Varanasi
Aghamarsh Varanasi 2020-3-17
编辑：Aghamarsh Varanasi 2020-3-17
Hi Kassandra,
You are trying to plot ScopeData. ScopeData, which seems to be a structure, doesn't seem to be defined in the current scope. Could you please share your Simulink (.slx) file, pertaining to your model.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Aghamarsh Varanasi
Aghamarsh Varanasi 2020-3-18
Hi Kassandra,
It seems that you want to plot the Simulink Scope Data in MATLAB. Data Import/Export from Simulink can be set using the Configuration Parameters dialogue box. You could open the dialogue box from Simulation > Model Configuration Parameters, or press Ctrl+E. In the Data Import/Export Tab, you can select the variable in which you want to export the Simulink data. By default, the data is exported into a variable named ‘out’.
Hence your matlab code would be,
x0 = -1;
A = -2;
B = 1;
C = 1;
D = 0;
t = linspace(0,10);
u = 2 +3*sin(3*t);
[y,~]=lsim(A,B,C,D,u,t,x0);
plot(t,y);
hold on
xlabel('time(s)');
ylabel('x(t)');
legend('lsim','simulink','Location','northwest');
%The output of simulink is stored in a variable 'out'
%Access Scope data from out variable
time = out.ScopeData.time;
signals = out.ScopeData.signals.values;
plot(time, signals, '*g');
Make sure that you simulate the Simulink model before running the MATLAB Code.
Hope this helps.

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 View and Analyze Simulation Results 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by