Draw a line on a 2D plot at a particular x and y values

30 次查看（过去 30 天）

显示更早的评论

Orion 2014-6-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/132043-draw-a-line-on-a-2d-plot-at-a-particular-x-and-y-values

编辑： Pulkit Rustagi 2020-9-25

采纳的回答： George Papazafeiropoulos

在 MATLAB Online 中打开

I'd like to draw a line at a particular x (and corresponding y) value for a plot that looks like this:

x=linspace(0,4)
y=x.^2
plot(x,y)

If I use the data cursor, it doesn't let me place it on a particular value (in my case where x=3), so I'd like it to do that and show me the x and corresponding y coordinates somewhere on the graph. Ideally, I'd like to have a dashed line protruding from the x and y axes to this point on the graph.

Any help would be appreciated.

Thanks

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

George Papazafeiropoulos 2014-6-2

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/132043-draw-a-line-on-a-2d-plot-at-a-particular-x-and-y-values#answer_139092

在 MATLAB Online 中打开

x=linspace(0,4);
y=x.^2;
plot(x,y);
line([3;3],[0;9],'linestyle','--');
line([0;3],[9;9],'linestyle','--');

4 个评论
显示 2更早的评论隐藏 2更早的评论

ARVIND KUMAR SINGH 2020-7-6

x=linspace(0,4);

y=x.^2;

plot(x,y);

line([3;3],[0;9],'linestyle','--','Color','red');

line([0;3],[9;9],'linestyle','--','Color','green');

Pulkit Rustagi 2020-9-25

编辑：Pulkit Rustagi 2020-9-25

Is it possible to label the said dashed line? is there a label field for line function?

Its not specificly mentioned in the documentation

https://www.mathworks.com/help/matlab/ref/line.html

请先登录，再进行评论。

类别

MATLAB Graphics 2-D and 3-D Plots

在 Help Center 和 File Exchange 中查找有关 2-D and 3-D Plots 的更多信息

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by