MATLAB: Adding Lines to Several Plots

fillplot

Hi Guys, I have 5 figures open and have used fill() to plot two areas on each figure. I now want to plot a single line on each on each figure. How would I go about doing this? would it be in the form

 [ax,f1,f2] = fill(x1,y1,c1,x2,y2,c2]

then

 gcf(ax,plot(xNew,yNew))

So my question is: is there some way of adding a plot to an figure which is already open without having to re plot the original data.

Thanks in advance.

Tim.

Best Answer

You need to keep hold on the axes handle in each figure, then plot on them specifically:

plot ( axesHandle1, X, Y );
plot ( axesHandle2, X, Y );
plot ( axesHandle3, X, Y );
plot ( axesHandle4, X, Y );
plot ( axesHandle5, X, Y );

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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

MATLAB: How to plot two figures on the same set of axes

 plot ( x, y )
 hold on
 plot ( a, b )

Best Answer

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MATLAB: How to put stacked plots in the same graph

MATLAB: How to plot two figures on the same set of axes

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