how to display an output on a plot itself?

Question

Mohiedin Bagheri 2023-1-17

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1895350-how-to-display-an-output-on-a-plot-itself

评论： Sam Chak 2023-1-17

采纳的回答： Sam Chak

Hi friends,

for this code:

x = linspace(-5,2);

y = -x-3;

z = 2*x

figure(1)

plot(x, y)

hold on

plot(x, z)

legend('x','y','location','best')

ix = interp1(y-z,x,0)

How can I cahnge this code and what coding line I should add so the solution (intersection point of y and z function, i.e., ix = -1) be displayed on the plot itself in a box?

Thank you

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Answer 1

Sam Chak 2023-1-17

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1895350-how-to-display-an-output-on-a-plot-itself#answer_1150285

编辑：Sam Chak 2023-1-17

在 MATLAB Online 中打开

Hi @Mohiedin Bagheri

Do you want to plot something like this?

x = linspace(-5, 2, 701);

y = - x - 3;

z = 2*x;

figure(1)

plot(x, y)

hold on

plot(x, z)

ix = interp1(y-z, x, 0);

iy = 2*ix;

plot(ix, iy, 'o', 'markersize', 15, 'linewidth', 3)

xlabel('x'), grid on

legend('y', 'z', 'location', 'best')

txt = ['\leftarrow intersection: x = ' num2str(ix)];

text(-1+0.25, -2, txt)

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Mohiedin Bagheri 2023-1-17

编辑：Mohiedin Bagheri 2023-1-17

@Sam Chak Thank you very much Sam. I appreciate your help.

All done! Voted and Accepted the Answer :)

Thanks buddy

Sam Chak 2023-1-17

@Mohiedin Bagheri, Don't mention it. Who knows I'll need your help in future.

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Answer 2

Abhinav 2023-1-17

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1895350-how-to-display-an-output-on-a-plot-itself#answer_1150280

Here is the link to find the intersection point of two line segments/lines. A fast two line intersection point finder based on the line parametric space. Finds the intersection point between two lines if it exists or else submits NaN.