Two x-axis for the same y-axis
61 views (last 30 days)
Show older comments
Zihad Azad
on 20 Feb 2020
Commented: Zihad Azad
on 20 Feb 2020
Hello dear altruist,
in need of help here. I need to add a second x-axis to the top of my graph here:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/272694/image.jpeg)
I tried from my end and this is the result. The x-axis on top is just normalized scale from 0 to 1 in reverse. Basically, the x-axis values at the top needs to be the inverse of the variable below (2*pi/kx). This would help me visualize the data both in terms of wavevector and wavelength. The codes and files are attached herwith. Thanks in advance.
clc; clear all;
load infinite;
% transpose matrix is not required
A1= log10(fs1);
kx=ky;
h1=figure
p1=pcolor(kx*1e-6,f/1e12,A1);
xlabel('\it{k_x} (\rm{\times10^6 m^{-1}})');ylabel('{\itf} (THz)');
ylim([33 1600]);
set(h1, 'Units', 'normalized');
get(h1, 'Position');
set(h1,'Position',[ 0.12 0.22 0.18 0.33]);
%colormap setting needs to come after each subplot
shading interp;
colormap jet(500);%colormap need to be set to jet for Blue-yellow-red map
ax1 = gca; % current axes
ax1_pos = ax1.Position; % position of first axes
ax2 = axes('Position',ax1_pos,'XAxisLocation','top','YAxisLocation','right','Color','none','YTick',[],'TickLength',[.00014 .0014]);
xlabel(ax2,'\rm lambda(\mum)');
l=(2*pi)/ky;
% L=length(l);
% y=zeros(L);
hold(ax2,'on');
% plot(ax2,l*1e7,y);
% line(l*1e7,y,'Parent',ax2,'Color','k');
set(ax2,'XDir','reverse');
% set(gcf,'visible','off');
%font properties
FS='Fontsize';
fs1=20;
fs2=20;
FN='Fontname';
fn='Times New Roman';
set(findall(gcf,'type','axes'),FS,fs1,FN,fn);
set(findall(gcf,'type','text'),FS,fs2,FN,fn);
x0=100;
y0=100;
width=700;
height=500;
set(gcf,'units','pixels','position',[x0,y0,width,height]);
0 Comments
Accepted Answer
Jakob B. Nielsen
on 20 Feb 2020
Edited: Jakob B. Nielsen
on 20 Feb 2020
You're on the right track with some of the stuff you have tabbed out. All you need is to set the x and y limits for your ax2 axes.
set(ax2,'XDir','reverse');
ylim(ax2,[33 1600]); %set the y and x limits on ax2
xlim(ax2,[0 100])
From here, you can just change the ax2 x axis limits to be whatever you want them to be, and use the regular commands for the ticks etc.
More Answers (0)
See Also
Categories
Find more on Blue in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!