MATLAB: Combining a graphics

graphics

i have a discrete time graphics. I have a graphic model in 0-50 second and i have another grpahic for 50-100 second. How can i combine then in one grahic? Thanks from now.

Best Answer

As far as I understand your question, you are looking for the HOLD command. Example code:

plot(0:50,rand(1,51),'b')
hold on
plot(51:100,rand(1,50),'k')

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x=[0 100 100 0 0]; y=[0 0 100 100 0]; 
x1=[50 50 50 50 50 60 70 80 80 80 80 80]; 
y1=[0 10 20 30 40 40 40 40 50 60 70 80]; 
plot(x,y);
hold on
for i = 1:length(x1)
    plot(x1(1:i),y1(1:i),'r')
    pause(0.2)
end

MATLAB: How to put stacked plots in the same graph

Alan,

To plot the data all in the same plot, do something like the following.

x1 = 0:.01:1;
y1 = x1.^2;
x2 = .5:.1:1;
y2 = -1*x2 + 10;
fHand1 = figure;
aHand1 = axes('parent', fHand1);
hold(aHand1, 'on')
plot(x1, y1, 'parent', aHand1);
plot(x2, y2, 'parent', aHand1);

To make the plots scale independent - so the min of the plot is at the bottom and the max is at the top - you need to normalize the y values before plotting. In this case, it helps to remove the y axis labels to avoid confusion. Here is how I did it.

y1 = (y1 - min(y1)) / (max(y1) - min(y1));
y2 = (y2 - min(y2)) / (max(y2) - min(y2));
fHand2 = figure;
aHand2 = axes('parent', fHand2);
hold(aHand2, 'on')
plot(x1, y1, 'parent', aHand2);
plot(x2, y2, 'parent', aHand2);
set(aHand2, 'YTickLabel', [])

Let me know if this solves your problem.

~Jonathan

Best Answer

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MATLAB: How can I make the line animated for x2, y2

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