Bob's pick this week is linkzoom by Carlos Adrian Vargas Aguilera.
The following plot shows temperature versus depth in two sets of units.
Z = linspace(0,150)'; % Depth in meters TC = -tanh((Z-30)/20)+23; % Temperature in °C dc2df = @(dc) (9/5)*dc + 32; % °C->°F mt2ft = @(mt) mt/0.3048; % meters->feet ax(1) = axes('YDir','reverse',... 'Box','off',... 'position',[0.13 0.11 0.77 0.78]); line(TC,Z,'parent',ax(1)) axis tight xlabel('Temperature, °C') ylabel('Depth, m') ax(2) = axes('Position',get(ax(1),'position'),... 'HitTest','off',... 'XAxisLocation','top',... 'YAxisLocation','right',... 'YDir','reverse',... 'XLim',dc2df(get(ax(1),'XLim')),... 'YLim',mt2ft(get(ax(1),'YLim')),... 'Color','none'); xlabel(ax(2),'Temperature, °F') ylabel(ax(2),'Depth, ft') linkzoom(ax)
The different units of measure are handled using a second axes. If you want to zoom and pan the plot, by default the two axes would not stay synchronized. MATLAB offers a very useful linkaxes command. That works great when plots share common X and/or Y coordinate values. In this case linkaxes would do the wrong thing. So Carlos created linkzoom. Once turned on, you can pan and zoom and both measurement scales stay in lock step. Download the submission and run this code in MATLAB to see for yourself.
Get
the MATLAB code
Published with MATLAB® 7.9
Great!!
I just checked it works right away with addaxis, http://www.mathworks.com/matlabcentral/fileexchange/9016 , too, for those who need a good multi-y-axis plot function but don’t like to touch their original zoom function.