Multiple X-axes non linear to each other

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Marina 2013-7-15

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/82054-multiple-x-axes-non-linear-to-each-other

I am aware that one can generate a plot with two x-axes, is it also posibble to generate such a plot with the x-axes non linear to each other.

I have a vector which can be plotted against both a distance and an angle, but the relationship between these two is not linear. Is it possible to plot the data against both variables in a single plot?

The vectors are not x,y,z, they are rather: y=data; x1=angle; x2=distance;

Using hold on/off doesn't really answer my question nor suit my data.

I have tried using the Multiple-X and Y axis approach from MATLAB docs (<http://www.mathworks.se/help/matlab/creating_plots/using-multiple-x-and-y-axes.html)>. Using the coding below, but the display allows for misinterpretation for the relationship between angle and distance hinting at a linear relationship. What I need is that in the plot below, the axes are so that the curves overlap.

distance=0:12:9000;
angle=atan(distance/1000)*(180/(2*pi));
data=logspace(0,1,length(distance));
x1 = angle;
y1 = data;
x2 = distance;
y2 = data;
figure;
l1 = line(x1,y1,'Color','r');
ax1 = gca;
set(ax1,'XColor','r','YColor','r')
ax2 = axes('Position',get(ax1,'Position'),...
         'XAxisLocation','top',...
         'YAxisLocation','right',...
         'Color','none',...
         'XColor','k','YColor','k');
hl2 = line(x2,y2,'Color','k','Parent',ax2);

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Marina 2013-7-15

Noted!, I've made nicer looking vectors

Marina 2013-7-15

I am looking for something similar to this, but for the x-axes only: http://i.stack.imgur.com/88llX.gif

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回答（1 个）

Azzi Abdelmalek 2013-7-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/82054-multiple-x-axes-non-linear-to-each-other#answer_91769

编辑：Azzi Abdelmalek 2013-7-15

在 MATLAB Online 中打开

If your vectors are x, y and z

plot3(x,y,z)

In your case

plot3(distnace,angle,data)

%or maybe you are looking for two plots

plot(distance,data,'g')
hold on
plot(angle,data,'r')
hold off

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Azzi Abdelmalek 2013-7-15

Then, what you want to do is to plot (data,angle), then just add a second x-axis (distance). Is that what you want?

Marina 2013-7-15

Yes BUT that the second axis reflects the relationship between angle and distance.

Because I do know how and have done already a plot with two x-axes (That's the code attached to the question), whats missing, is for the second axis to reflect its relationship with the primary axis.

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