Vertical grid line for x=0

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Jan w
Jan w 2017-1-1
评论： Star Strider 2020-12-17
I am using horizontal gridlines for a plot.
ax = gca;
ax.XGrid = 'off';
ax.YGrid = 'on';
How can I add only one vertical line through x=0?

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采纳的回答

Star Strider
Star Strider 2017-1-1
You can plot a vertical line anywhere by duplicating the x-coordinate and plotting it against ylim:
figure(1)
plot([0 0], ylim, '-r')
ax = gca;
ax.XGrid = 'off';
ax.YGrid = 'on';

更多回答（2 个）

Image Analyst
Image Analyst 2017-1-1
The best answer is to use YAxisLocation:
theta = linspace(-pi, pi, 800);
plot(theta, sin(theta), 'b-') % Plot something.
% Make axes go through origin instead of left and bottom sides of axes box.
ax = gca;
ax.XAxisLocation = 'origin'
ax.YAxisLocation = 'origin'
  4 个评论
显示 2更早的评论
Jan w
Jan w 2017-1-2
Yes this works fine for me!
Image Analyst
Image Analyst 2017-1-2
You're welcome. Maybe you could "Vote" for the answer (under my logo).

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the cyclist
the cyclist 2017-1-1
编辑：the cyclist 2017-1-1
line([0 0],[0 1],'Color','Black')
See line for details of setting the properties of the line.
  2 个评论
Brian Russell
Brian Russell 2020-12-16
You simply need to write yline(0) or xline(0) for vertical and horizontal lines.
Star Strider
Star Strider 2020-12-17
Note that xline and yline were introduced in R2018b, 1½ years after this was posted.

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