plotxx.m

PLOTXX Create graphs with x axes on both top and bottom

Description

PLOTXX Create graphs with x axes on both top and bottom
 
Similar to PLOTYY, but ... the independent variable is on the y-axis, and both dependent variables are on the x-axis.
 
For example, you may wish to plot temperature and salinity as a function of depth in the ocean. In the atmosphere, plot temperature and relative humidity as a function of altitude, etc.

• MATLAB release: MATLAB 5.2 (R10)

[Lina Chang]

Very helpful for creating nomographs. Thanks.

[Sachin Chandra]

Very useful. I often why mathworks didnt have a function similar to plotyy..
 I think additional parameters like passing colors,line width can be helpful too..

[yang ying]

useful programme

[Izru Garner]

Well done Dennis by your scripts, I agree with Lina Chang.

[Sacit Cetiner]

Thanks, saved me a lot of programming

[Sloane Wiktorowicz]

Useful as a corollary to plotyy. Would be useful to have two inversely proportional axes for one plot (e.g., wavelength on bottom and energy on top). Though this isn't too hard to do from plotxx. Thanks!

[Peter Burns]

To avoid inconsistent axes ranges, I suggest calling
> axis tight
after plotxx. You might consider adding this to the function as a precausion.

[James Housley]

Is it just me, or does this not work with subplots?

[Dave Sproson]

To use with subplot, you need to comment out

set(ax(1),'Position',[0.12 0.12 0.75 0.70])

on line 65.

[Leo B]

add
set(ax(1),'Box','on','ActivePositionProperty','position')
to get the position right
add
set(ax(2),'YAxisLocation','right','Color','none', ...
          'XGrid','off','YGrid','off','Box','off');

[abdur rahman]

very useful thanks

[Guyennon Nicolas]

thanks a lot for this solution ! (very usefull for vertical profiles)

add
set(ax(1),'XLim',[min(x1) max(x1)]);
set(ax(2),'XLim',[min(x2) max(x2)]);

to get autoscale on both x axis

or you may prefer to use :
[low,high,ticks] = bestscale(ylim1(1),ylim1(2),ylim2(1),ylim2(2),islog1 | islog2);
 with
set(ax(1),'XLim',[low(1) high(1)],'XTick',xticks1);
    set(ax(2),'XLim',[low(2) high(2)],'XTick',xticks2);

if you want to get a better ticks layout

(see open plotyy to copy bestscale sub function)

[Simon Vassant]

Good stuff. How can I make it work for inversely proportionnal axes : i.e. wavelength (in microns) and wavenumbers (in cm^-1) ?

[Jayne]

Is it possible to make a bar graph and a line graph with different x axes on the same figure using this program? Thanks.

[David Verrelli]

% This works at least:

set(findobj('Type','line'), 'LineWidth',lw)

% From web('jar:file:///C:/Program Files/MATLAB/R2009b/help/techdoc/help.jar!/ref/set.html', '-helpbrowser')

[Joffray Guillory]