blocks|key|5179034|text|我不相信有更方便的内置方式。我使用的是来自FileExchange的hline()和vline()，它们的工作方式非常棒：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5179035|http://www.mathworks.com/matlabcentral/fileexchange/1039|5179036|entityMap|0|LINK|mutability|MUTABLE|url^0|Y|7|16|7|0|0|1K|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@$9|U|A|V|1|W]]|E|$]]|$1|H|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|G]]]]

I don't believe there is a built-in way that is more convenient. I use <code>hline()</code> and <code>vline()</code> from FileExchange, which work like a charm:

<a href="http://www.mathworks.com/matlabcentral/fileexchange/1039" rel="noreferrer">http://www.mathworks.com/matlabcentral/fileexchange/1039</a>

blocks|key|4895336|text|存在未记录的函数graph2d.constantline|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4895337|plot(-2:5,+(-2:5).%5E2-1)

%25#+vertical+line
hx+=+graph2d.constantline(0,+'LineStyle',':',+'Color',[.7+.7+.7]);
changedependvar(hx,'x');

%25#+horizontal+line
hy+=+graph2d.constantline(0,+'Color',[.7+.7+.7]);
changedependvar(hy,'y');|code-block|syntax|javascript|4895338|​|4895339|📷|atomic|4895340|4895341|好的是，它在内部实现了轴限制的侦听器(处理像平移、缩放等的变化)。所以这些线看起来会延伸到无穷远。|4895342|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/d5b5e4477641b4d57ffc2d82108521e1.png|imageAlt^0|8|K|0|0|0|0|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|15|8|@]|D|@]|E|$]]|$1|M|3|N|5|O|7|16|8|@]|D|@$9|17|A|18|1|19]]|E|$]]|$1|P|3|L|5|6|7|1A|8|@]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1B|8|@]|D|@]|E|$]]|$1|S|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z|10|-4]]]]

There exist an undocumented function <code>graph2d.constantline</code>:

<pre><code>plot(-2:5, (-2:5).^2-1)

%# vertical line
hx = graph2d.constantline(0, 'LineStyle',':', 'Color',[.7 .7 .7]);
changedependvar(hx,'x');

%# horizontal line
hy = graph2d.constantline(0, 'Color',[.7 .7 .7]);
changedependvar(hy,'y');
</code></pre>

<img src="https://i.stack.imgur.com/99eeQ.png" alt="screenshot">

The nice thing is that it internally implements a listener for the axes limits (handles change like pan, zoom, etc..). So the lines would appear to extend to infinity.

blocks|key|5179121|text|您可以在创建图形后直接获得此x范围。它有点像这样：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5179122|x=-2:5;
y=x.%5E2-1;

figure()
plot(x,y);

xlim+=+get(gca,'xlim');++%25Get+x+range+
hold+on
plot([xlim(1)+xlim(2)],[0+0],'k')|code-block|syntax|javascript|5179123|​|5179124|📷|atomic|offset|length|5179125|5179126|请注意，如果在图中执行任何手动缩小操作，则可能需要重新绘制该线以遍历整个新的x范围。|5179127|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/6425c04a4e5100a8f4ef443173c0e222.png|imageAlt^0|0|0|0|0|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|10|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|11|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|12|8|@]|9|@$L|13|M|14|1|15]]|A|$]]|$1|N|3|H|5|6|7|16|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|17|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X|Y|-4]]]]

You could get this x range directly after the figure has been created. It goes a little something like this:

<pre><code>x=-2:5;
y=x.^2-1;

figure()
plot(x,y);

xlim = get(gca,'xlim'); %Get x range 
hold on
plot([xlim(1) xlim(2)],[0 0],'k')
</code></pre>

<img src="https://i.stack.imgur.com/MQDpN.png" alt="enter image description here">

Note that if you do any manual zooming out in the figure, the line might have to be redrawn to go over the entire new x range.

blocks|key|872797|text|像GNU中那样的vline和hline命令会很棒，但是我找不到比这更短的解决方案了|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|872798|plot(1:10,sin(1:10));
line(xlim,[0+0],'Color','r')+|code-block|syntax|javascript|872799|entityMap^0|8|5|E|5|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

A <code>vline</code> and <code>hline</code> command like in GNU R would be great, but I could not find a shorter solution than

<pre><code>plot(1:10,sin(1:10));
line(xlim,[0 0],'Color','r') 
</code></pre>

blocks|key|4895390|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4895391|通过plot()命令或stem()绘制数据。将打开一个图形窗口。|ordered-list-item|offset|length|style|CODE|4895392|然后在图形窗口中，单击|4895393|4895394|菜单栏中，将出现一个下拉菜单。|4895395|从此菜单中单击line命令，现在|unordered-list-item|4895396|4895397|光标将变为加号。|4895398|现在您可以在任意位置绘制直线，水平或|4895399|4895400|垂直的或倾斜的。change+of+the+>|4895401|您可以通过右键单击|4895402|4895403|行，将出现一个菜单，您可以从中选择您想要的|4895404|4895405|如果您想要图形的代码，请单击properties.|4895406|
|4895407|If菜单，然后单击generatecode选项，这是一个新的文本编辑器|4895408|4895409|窗口将会打开，您可以保存此代码以备将来使用。祝你好运。|4895410|entityMap^0|0|2|6|B|6|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|-4|4|5|6|1E|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|1F|7|@$D|1G|E|1H|F|G]|$D|1I|E|1J|F|G]]|8|@]|9|$]]|$1|H|3|I|4|C|6|1K|7|@]|8|@]|9|$]]|$1|J|3|-4|4|5|6|1L|7|@]|8|@]|9|$]]|$1|K|3|L|4|5|6|1M|7|@]|8|@]|9|$]]|$1|M|3|N|4|O|6|1N|7|@]|8|@]|9|$]]|$1|P|3|-4|4|5|6|1O|7|@]|8|@]|9|$]]|$1|Q|3|R|4|5|6|1P|7|@]|8|@]|9|$]]|$1|S|3|T|4|O|6|1Q|7|@]|8|@]|9|$]]|$1|U|3|-4|4|5|6|1R|7|@]|8|@]|9|$]]|$1|V|3|W|4|5|6|1S|7|@]|8|@]|9|$]]|$1|X|3|Y|4|O|6|1T|7|@]|8|@]|9|$]]|$1|Z|3|-4|4|5|6|1U|7|@]|8|@]|9|$]]|$1|10|3|11|4|5|6|1V|7|@]|8|@]|9|$]]|$1|12|3|-4|4|5|6|1W|7|@]|8|@]|9|$]]|$1|13|3|14|4|O|6|1X|7|@]|8|@]|9|$]]|$1|15|3|16|4|5|6|1Y|7|@]|8|@]|9|$]]|$1|17|3|18|4|O|6|1Z|7|@]|8|@]|9|$]]|$1|19|3|-4|4|5|6|20|7|@]|8|@]|9|$]]|$1|1A|3|1B|4|5|6|21|7|@]|8|@]|9|$]]|$1|1C|3|-4|4|5|6|22|7|@]|8|@]|9|$]]]|1D|$]]

<ol>
<li>Draw your data by <code>plot()</code> command or <code>stem()</code>. A figure window will open.</li>
<li>Then on the figure window, click on the [insert] command from the 
 menu bar, a drop-down menu will appear.</li>
<li>From this menu click on the [line] command, now the shape of the 
 cursor will change into a plus sign.</li>
<li>Now you can draw a line anywhere you want, either horizontal or 
 vertical or slanted. </li>
<li>You can change the properties of line by right clicking on the 
 line, a menu will appear from which you can choose your desires 
 properties.</li>
<li>If you want to have some ticks on the line then you can use add 
 text option, and place text where ever you want.</li>
<li>If you would like to have a code for your figure, click on [file]
 menu and then click on [generatecode] option, a new text editor 
 window will open, you can save this code for further use. Good luck.</li>
</ol>

blocks|key|3281747|text|自MATLAB+R2018b以来，就有了用于此目的的yline：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3281748|+yline(0)|code-block|syntax|javascript|3281749|在y==0处绘制水平线。|3281750|entityMap|0|LINK|mutability|MUTABLE|url|https://www.mathworks.com/help/matlab/ref/yline.html^0|Q|5|Q|5|0|0|0|1|4|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|F|3|G|5|H|7|10|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

Since MATLAB R2018b there is <a href="https://www.mathworks.com/help/matlab/ref/yline.html" rel="nofollow noreferrer"><code>yline</code></a> for this purpose:

<pre><code> yline(0)
</code></pre>

draws a horizontal line at <code>y==0</code>.

I want to add a x-axis line at 0 to a Matlab figure so that I can compare my data to see if it is positive or negative when saving the figures to a jpg. What is the best way to do this? I know you can use <code>line()</code> but it just seems cumbersome because you need to specify the x and the y ranges. Is there an easier way?

How to add a x-axis line to a figure? (matlab)

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想在Matlab图形上添加一条0处的x轴线，这样在将图形保存到jpg时，我就可以比较我的数据，看看它是正数还是负数。做这件事最好的方法是什么？我知道你可以使用line()，但是它看起来很麻烦，因为你需要指定x和y的范围。有没有更简单的方法？

问如何将x轴线添加到图形中？(matlab)
EN

回答 6

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问如何将x轴线添加到图形中？(matlab)EN

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问如何将x轴线添加到图形中？(matlab)
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