Unable to plot two functions to find the intersection points

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ImNew Matlab
ImNew Matlab 2012-11-6
Here is what I'm doing:
x=linspace(0, 1);
y1=abs(x).^-5 .* exp(x.^2) - atan(9976+1000);
y2=besselj(0,x);
plot(x, y1, x, y2);
When I plot this I get a graph with one line. How do I get both lines and then find there intersection points?

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Matt Fig
Matt Fig 2012-11-6
编辑：Matt Fig 2012-11-6
Try this way. You have to pay attention to the ylimits!
x=linspace(0, 5,1000);
y1=abs(x).^-5 .* exp(x.^2) - atan(9976+1000);
y2=besselj(0,x);
plot(x, y1, x, y2);
ylim([-10 10]) % Set the ylimit to a reasonable value!
Now you can look and guess at their intersection points. Say about x=1 and x=2. We can use FZERO to get a more exact location.
f = @(x) besselj(0,x)-(abs(x).^-5 .* exp(x.^2) - atan(9976+1000));
[fzero(f,1),fzero(f,2)]
  2 个评论
Azzi Abdelmalek
Azzi Abdelmalek 2012-11-6
Thanks Matt, I thought x=linspace(0, 1) generate just two values. Next time I will check before writting false things
Matt Fig
Matt Fig 2012-11-6
No worries, Azzi. My first thought was the same as yours, it is only because I remember checking this once that I knew...

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