Transfer data from a figure to variable

Hi,

I'm using Matlab Simulink to simulate the behavior of a electric circuit.

I obtain the average transfer function by using "averaging spectrum analyzer" block. What i need to do is to obtain the data of this average transfer function. I mean, i want to obtain in a vector x the range of frequency and in a vector y the range of gain.

How can i do it?

Thanks in advanced, Néstor

Answer 1

[Azzi Abdelmalek]

open axes proprieties of your figure,then click "more proprieties"

1. select the second plot then click "more proprieties" you will find your data in xdata and ydata
2. do the same to the third plot

be sur that you select the plot (not only the box)

 x=get(gco,'XData');y=get(gco,'YData');

[Azzi Abdelmalek]

I will search how to do it by line command

[Azzi Abdelmalek]

% to transfer your data

clck on figure properties, then select your plot and go to Matlab command

 x=get(gco,'XData');y=get(gco,'YData');

[Néstor Monedero]

Hi Azzi, i click on figure properties and select the average transfer function that i obtain with averaged spectrum analyzer. I don't find XData or YData clicking in more properties. I use Matlab 2011. I need to save the points x (frequency) and y (gain) in a vector to work with this then.

Thanks. Néstor

[Azzi Abdelmalek]

Néstor, be sur to click on the plot, not just on the windows, you will see your points highlighted. when you are done go to matlab command and write

x=get(gco,'XData');y=get(gco,'YData');

[Néstor Monedero]

Thanks Azzi.

Answer 2

[Robert Cumming]

to do it without interacting with the mouse at all you can get to the data through the children of the axes handle: e.g.

figure; 
plot ( magic(10) ); 
axes_children = get ( gca, 'children' );
axes_lines = findobj ( axes_children, 'type', 'line' );
xdata = get ( axes_lines, 'xdata' )
ydata = get ( axes_lines, 'ydata' )

[Azzi Abdelmalek]

his figure contains 3 plots (subplot(3,1,i)). he must select one

[Robert Cumming]

Where does it say that?

Anyway theory still remains true - the plot data can be obtained automatically through the axes(or sub axes...) handle and the children of the axes....

[Azzi Abdelmalek]

It was said in his question. that's what "averaging spectrum analyzer" do

[Robert Cumming]

Ok - I've never used that so wouldn't know... You learn something new everyday :)