MATLAB: Linked axis without linkaxes

linkaxesMATLABsubplotzoom

I have an installation of Matlab showing figures with subplots with linked axes (zooming in one subplot makes the other subplot to zoom in the same x values). The same script, run in another installation of matlab, does not link axes (zooming in one subplot, other subplots are not affected).

I know that linkaxes can be used for this purpose, but since the script is the same run in two different machine, there should be something else that may change the behaviour of the zoom in the axes. Any hint why one installation of matlab seems to have default x axes linked? Thanks Claudio

Additional informations— The axes linked by default are x-axes of all subplots. Y are not linked. Linking Y axes is possible using linkaxes (and it works). Disabling linkaxes, disables only the y link, but x link is not disabled (so, the link seems not to come from linkaxes, but from somewhere else that I still could not identify )

Best Answer

I think I found something finally. The matlab installation that have the "linkaxes" option enabled by default has several scripts installed included into the Matlab path. By disabling all the the path that are Matlab's defaults, the problem is solved. Now I just have to selectively disable each path until I don't find the exact responsible for the linked axes.

Related Solutions

MATLAB: Unable to link x-axis in subplot

Example

clc,clear
x = linspace(0,10);
y1 = sin(x)./x;
y2 = sin(x)/2;
ax(1) = subplot(2,1,1);
plot(x,y1)
ax(2) = subplot(2,1,2);
plot(x,y2);
set(ax,'Xlim',[2 5],'Box','on')
set(ax,'xgrid','on','ygrid','on')
axis(ax,'equal')

MATLAB: Do Y-axes tick marks appear on both axes when using PLOTYY in MATLAB 7.12 (R2011a)

The function PLOTYY creates two sets of axes and uses the property YAxisLocation to put them on different sides on a figure. By default, Y tick marks are spaced such that the overlap exactly and it appears that there is only one set of tick marks on each of the Y axes.

However, when tick mark properties (such as their quantity, spacing or Y limits) are modified manually, without ensuring that the same number of tick marks is present on both axes, the above behavior is seen (i.e. two sets of tick marks on one of the axes).

The axis property 'Box' controls the presence of Tick marks on both sides on an axis. By default, PLOTYY sets the value of this property to 'off' for the right axes and to 'on' for the left axes (that is why the double tick marks appear on the right axes).Setting the value of the property 'box' to 'off' for both axes will remove the extra sets of tick marks from the other side as well.

However, this will also remove the top edge of the axes (the bounding box) and the image may look borderless when it is saved or printed. As a workaround, one of the two sets of X axes (which were created with PLOTYY) may be moved to the top of the figure, effectively replacing the bounding box along that edge. The two X axes may need to be linked via the command LINKAXES to make sure that the two plots are synchronized when zooming in.

The following code illustrates the issue and the workaround, step by step (note the commands PAUSE in this code):

%%create some data to plot
t = 1:100;
y1 = abs(1e4*sin(.01*t));
y2 = abs(cos(.02*t));
%%create a figure and use PLOTYY, saving the output handles
fg = figure(5);
% note that by default the tick marks overlap exactly (and it seems that
% only one set of tick marks is present per line axis
[AX,H1,H2] = plotyy(t, y1, t, y2);
% press ENTER to continue

pause;
%%change the number of tick marks on each Y axis to see the issue
Nticks = 8;
y1 = linspace(0, 8e4, Nticks);
y2 = linspace(0, 14, Nticks+4); %put 4 more ticks on the right Y axis
% set the new limits and tick marks. Notice how there appear to be two sets
% of tick marks on the right axis.
set(AX(1), 'ylim', [y1(1), y1(end)], 'ytick', y1);
set(AX(2), 'ylim', [y2(1), y2(end)], 'ytick', y2); 
% press ENTER to continue
pause;
%%link the two X axes
linkaxes(AX,'x');
%%turn off the axis Box property for box axis
% the box property results in the display of tick marks on both axis
set(AX(1),'Box','off')
set(AX(2),'Box','off')
% notice how the bounding box on top of the image is missing
%%replace the top edge of the box with the second X axes
% and turn off its labels
set(AX(2), 'XTickLabel','','XAxisLocation','Top') 
%%print the figure to .png format
% to confirm that the output is as desired
print(fg,'-dpng','myFigure');

Best Answer

Related Solutions

MATLAB: Unable to link x-axis in subplot

MATLAB: Do Y-axes tick marks appear on both axes when using PLOTYY in MATLAB 7.12 (R2011a)

Related Question