Interactive manipulation with graph in Matlab

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Aleksandar
Aleksandar 2011-7-18
Hi,
I am trying to plot a graph that has a filling underneath it, and a threshold value like a bar that can vary, so that the filling of the areas separated by the threshold is differently colored. I should be able to that by combining the functions "area" and "bar".
I would like to make the graph interactive, namely I would like to see how the graph would look like if the threshold value varies. Basically I am looking for something that is very similar to the "Manipulate" function in Wolfram Mathematica (link for reference):
http://reference.wolfram.com/mathematica/ref/Manipulate.html
Any suggestion would be greatly appreciated. Many thanks in advance!

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回答（2 个）

Sean de Wolski
Sean de Wolski 2011-7-18
Perhaps Doug's Challenge/Replies/Answer will be useful to you:
Blogs:Doug:Challenge/User_replies
Blogs:Doug:His_Answer
  1 个评论
Aleksandar
Aleksandar 2011-7-18
Thanks a lot! I also got another idea by using a slider which was the one I was hoping to get, but this one by using the mouse is also very intuitive. I will experiment with both of the approaches and see which one fits better to my needs.

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Patrick Kalita
Patrick Kalita 2011-7-18
You can achieve an effect similar to Mathematica's "Manipulate" by adding a uicontrol to your figure and programming it's Callback property to adjust the graph as needed. This requires some effort, but provides a lot of flexibility. Here is a very simple example:
% Make the plot
a = area( randn(1, 100) );
% Add a slider
uicontrol( ...
'Style', 'slider', ...
'Min', -3, ...
'Max', 3, ...
'Callback', @(src, evt) set(a, 'BaseValue', get(src, 'Value')));
  1 个评论
Aleksandar
Aleksandar 2011-7-18
Thanks a lot, this is exactly what I was looking for! I also got another idea by using the mouse which is also very intuitive. I will experiment with both of the approaches and see which one fits better to my needs.

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