在Matlab中使用bar3时如何设置x和y值? [英] How to set x and y values when using bar3 in Matlab?

问题描述

快速版本

如何在Matlab中控制3维条形图的x和y值?

How can I control the x- and y-values for a 3-d bar plot in Matlab?

详细信息

假设我们有一个10 x 20的数据矩阵，并使用bar3对其进行绘制，并且我们想要设置x和y值.例如:

Say we have an 10 x 20 data matrix and we plot it using bar3, and we want to set the x- and y-values. For instance:

foodat = rand(10,20);
xVals = [5:14];
yVals = [-3:16];
bar3(xVals, foodat);
xlabel('x'); ylabel('y');

是否也有办法为其提供yVal?否则，y轴始终默认为[1:N].

Is there a way to feed it the yVals as well? Otherwise the y axes always defaults to [1:N].

请注意，我不只是想使用XTickLabel和YTickLabel更改标签.我需要更改轴上的实际值，因为我在同一图中绘制了多个东西.仅更改(错误的)轴刻度标记的方式是不够的.因此，这与此类问题有所不同:

Note I don't just want to change the labels using XTickLabel and YTickLabel. I need to change the actual values on the axes, because I am plotting multiple things in the same figure. It isn't enough to just change how the (wrong) axis ticks are labeled. So this is different from issues like this:

如何可以在MATLAB中调整3-D条形分组和y轴标注吗?

我尝试过的其他事情

当我尝试通过以下方式更改xval时:

When I try changing the xvals with:

set(gca,'XTick', xVals)
set(gca,'YTick', yVals)

这些值已被接受，但实际上显示在错误的轴上，因此似乎使用bar3切换了x和y轴.另外，反正为时已晚，因为条形图已经用错误的x值和y值绘制了，所以我们最终给空值打了勾.

The values are taken in, but actually show up on the wrong axes, so it seems x and y axes are switched using bar3. Plus, it is too late anyway as the bar graph was already plotted with the wrong x- and y-values, so we would end up giving ticks to empty values.

已添加注释

Matlab技术支持部门刚刚通过电子邮件发送给我，让我了解了用户提供的功能scatterbar3，该功能以与接受的答案不同的方式实现了我想要的功能:

Matlab tech support just emailed me to let me know about the user contributed function scatterbar3, which does what I want, in a different way than the accepted answer:

http://www.mathworks.com/matlabcentral/fileexchange/1420-scatterbar3

推荐答案

我找到了一种方法.麻烦给您一段代码，然后您需要整理"，主要是轴限制和Xticks，因为bar3确实在内部设置了Xticks，因此，如果需要其他内容，则需要设置它们自己动手.

I found a way of doing it. Ill give you a piece of code, then you'll need to "tidy up" , mainly the axis limits and the Xticks, as bar3 does set up the Xticks inside, so if you want others you'll need to set them manually yourself.

因此，这里的技巧是从bar3句柄获取Xdata.这里的问题是，似乎数据的每一行都有一个句柄，因此您需要为它们中的每一个进行迭代.这是当前输出的代码:

So the trick here is to get the Xdata from the bar3 handle. The thing here is that it seems that there is a handle for each row of the data, so you need to iterate for each of them. Here is the code with the current output:

foodat = rand(20,10);
xVals = [5:14];
yVals = [-3:16];


% The values of Y are OK if called like this.
subplot(121)
bar3(yVals, foodat); 

subplot(122)
h=bar3(yVals, foodat); 
Xdat=get(h,'XData');
axis tight
% Widdth of barplots is 0.8
for ii=1:length(Xdat)
    Xdat{ii}=Xdat{ii}+(min(xVals(:))-1)*ones(size(Xdat{ii}));
    set(h(ii),'XData',Xdat{ii});
end



axis([(min(xVals(:))-0.5) (max(xVals(:))+0.5) min(yVals(:))-0.5, max(yVals(:))+0.5]) 

注意:Y看起来有所不同，但没什么.

Note: Y looks different but is not.

您现在可以看到X值就是您想要的值.如果您希望间隔除1以外的其他大小，则需要更改代码，但是您可以猜测可能性有多大！

As you can see now the X values are the ones you wanted. If you'd want other size than 1 for the intervals between them you'd need to change the code, but you can guess how probably!

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