Select a point in Scope Graph

2011 2 28
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更新时间：2024 8 28
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How do I select a point in the graph generated using the scope? I want to know the magnitude of the graph.

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Paulo Silva
Paulo Silva 2011-2-28

1 个投票

For what I can see you can't do it directly in the scope (matlab 2008b), some options:
#1 Export the signals to matlab and analyse them in there, you can save the scope data in a scope option or use the To Worspace block.
#2 Using the MinMax Running Resettable you can see the magnitude max and min of your signal, send the output of that block to one display block.

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Kai Hao Then
Kai Hao Then 2011-2-28
I couldn't even save the graph as image file i.e. in jpeg format. Besides, I couldn't find the way to export the signals. Mind showing the way? I am using Matlab 2010a.
Paulo Silva
Paulo Silva 2011-2-28
Go to the sinks library, take the To Worspace block and connect it to the place where you need to analyse the signal, now go the block To Workspace parameters (right click on it, it's one of the options), select the output format Structure with time.
Run the simulation, and plot the data like this:
plot(simout.time,simout.signals.values)
Paulo Silva
Paulo Silva 2011-2-28
After plotting go to the figure toolbar and click on the Data Cursor, this will enable you to see info about the point on the line where the cursor is, click on the plot line.
Kai Hao Then
Kai Hao Then 2011-2-28
I labelled the X axis and Y axis but how come when I used the data cursor to find the points, it still showed X and Y?
Paulo Silva
Paulo Silva 2011-2-28
The datacursor does that by default
Paulo Silva
Paulo Silva 2011-2-28
Here's another of Doug's excellent video tutorials, he must have special powers to know what tutorials do we need http://blogs.mathworks.com/videos/2011/02/25/creating-a-custom-data-cursor/

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更多回答（3 个）

Paulo Silva
Paulo Silva 2011-3-1

1 个投票

Here's one way I just learned using the simplot function, example
vdp
set_param(gcs, 'SaveOutput', 'on')
set_param(gcs, 'SaveFormat', 'StructureWithTime')
sim(gcs)
simplot(yout)
I'm sorry for discovering this only now but it works great :)
Kai Hao Then
Kai Hao Then 2011-3-1

0 个投票

I have tried this command:
plot(simout.time,simout.signals.values)
It works great.
Now let's say I have 3 simout(s) i.e.
(a) simout
(b) simout1
(c) simout2
How do I type the command to show these 3 graphs?

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Paulo Silva
Paulo Silva 2011-3-1
%in diferent axes
subplot(311)
plot(simout.time,simout.signals.values)
subplot(312)
plot(simout1.time,simout1.signals.values)
subplot(313)
plot(simout2.time,simout2.signals.values)
%in the same axes
hold on
plot(simout.time,simout.signals.values)
plot(simout1.time,simout1.signals.values)
plot(simout2.time,simout2.signals.values)
legend('simout','simout1','simout2')

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Angelina
Angelina 2024-8-28

0 个投票

bagaimana cara mengembalikan workspace pada matlab

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