plotting graph in simulink

Pat
2012 11 6
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I have to plot graphs in simulink the graphs is i the link
http://imgur.com/nVY8q
how can we plot the graph in simulink,if not possible in simulink ,please tell how to plot in matlab m file

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Azzi Abdelmalek
Azzi Abdelmalek 2012-11-12
编辑：Azzi Abdelmalek 2012-11-12

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This is a plot of a step response of second order system, you can use step command in a for loop, varying the damping coefficient sigma from 0 to 1
hold on;
sigma=.5;
for k=1:5
w0=1;
sigma=sigma+.1;
N=[w0];
D=[1 2*sigma*w0 w0^2]
step(N,D)
end
grid

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Azzi Abdelmalek
Azzi Abdelmalek 2012-11-12
you can get the same figure in simulink, by simulating 5 ore more second order transfer function with differents damping coefficient sigma, and use one scope and one multiplexer
Pat
Pat 2012-11-17
Thanks Azzi But those grapg are in negative region,please tell how t0 plot
Azzi Abdelmalek
Azzi Abdelmalek 2012-11-17
What do you mean by they are in negative region, and show correctly the image you want to make.
Pat
Pat 2012-11-17
my graph is
http://www.sendspace.com/file/44fh7a
in this non-stable region B is in negative axis..
non-stable region A is in positive axis..
is it possible to get graph like this..else plz tell hoe to plot non-stable region B in negative axis
Azzi Abdelmalek
Azzi Abdelmalek 2012-11-17
It appears that is a frequency response, what your graph is supposed to represent?
Pat
Pat 2012-11-17
ya azzi its a frequency response,it represents non stability regions during power flow
Azzi Abdelmalek
Azzi Abdelmalek 2012-11-17
You can't just draw this plot, you must provide the frequency response
Pat
Pat 2012-11-17
is it possible to draw non stability region B in negative region

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Kaustubha Govind
Kaustubha Govind 2012-11-6

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MATLAB might be more appropriate if you want to control the line styles. See Specifying Line Style.

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Pat
Pat 2012-11-7
I need to plot like given in image ,the code to plot such graphs,can u help me please
K E
K E 2012-11-8
Here is documentation on getting started with plotting in Matlab. Here is another link on plotting.
Pat
Pat 2012-11-9
I know to plot different graphs with line specified ,but how to get the same shape as i have posted
Walter Roberson
Walter Roberson 2012-11-9
You put it together yourself, calculating where all the lines should go.
There is no built-in plot of that style that I know of in MATLAB (but it is possible it exists in a toolbox somewhere or in Simulink somewhere and I just have not run across it yet.)
Kaustubha Govind
Kaustubha Govind 2012-11-12
Pat: Are you asking us to identify the function that has been plotted? That might be difficult to do.

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