Plot dashed lines to given y value on a graph
9 次查看(过去 30 天)
显示 更早的评论
How can I get dashed lines from each axis out to a point at a graph, given by a specified y value?
Somehow i would also like to get the corresponding x value represented.
Thanks for any help. For use in an example:
x = [0:1:25];
y = x * pi ;
plot(x,y)
0 个评论
采纳的回答
Walter Roberson
2021-4-20
x = [0:1:25];
y = x * pi ;
stem(x,y, '--')
4 个评论
Walter Roberson
2021-4-20
x = [0:1:25];
y = x * pi ;
plot(x, y);
hold on
ytarg = 30;
[~,yidx] = min(abs(y-ytarg));
xtarg = x(yidx);
plot([0, xtarg xtarg], [30 30 0], '--');
text(2, 50, sprintf('x=%g', xtarg), 'HorizontalAlignment', 'center')
plot([2 xtarg], [50 y(yidx)], '-k');
hold off
With this code, you would need to use a finer-grain x to have the points match up better.
You could interpolate to find a more accurate x, but the ease of doing that would depend upon whether the y is monotonic. y is monotonic in this case, so it could be done easily with xi = interp1(y,x,30)
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Annotations 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!