example.m

%% ZoomBox Example
% Zoom box creates a resizable, movable box in a parent axes that controls
% the axis limits in the children axes.
%

%% Demo Explaination: Clean up and then load in some data
% Switch the argument in the if statement to get different data. Change the
% value of N to generate large data sets.  Different modes of ZoomBox
% should be used based on the size of the data set.

clear; clc; close all

if 0
    load handel
    Ns = 2^12;
    Y = fft(y,Ns);
    df = Fs/Ns;
    x  = (0:1:Ns/2-1)*df;
    y1 = 2/Ns*abs(Y(1:Ns/2));
    y2 = sqrt(y1);
else
    N = 9000;
    x  = linspace(0,1,N);
    y1 = polyval([1 0.3 0.4],x);
    y2 =     cos(20*x); 
end

%% Demo Explaination: Create the Axes, save the handles and plot the data.
% Each of the axes should be populated with data, normally the parent axes
% has all of the data from the children axes, but this is not a
% requirement.  ZoomBox only cares about the axes limits, not the data that
% is shown.

hChildAxes(1) = subplot(3,1,1);
plot (x,y1,'r-');

%figure %uncomment to try putting the axes on different figures.
hChildAxes(2) = subplot(3,1,2);
plot (x,y2,'b-');

%figure %uncomment to try putting the axes on different figures.
hParentAxes   = subplot(3,1,3);

n = 1; %Change n to change th amount of decimation that occurs in parent axes.
plot (x(1:n:end),y1(1:n:end),'r-',x(1:n:end),y2(1:n:end),'b-')


%% Demo Explaination: Call ZoomBox
% Change the third argument to try different update modes.  See help for
% different modes.
zoomBox(hParentAxes, hChildAxes,0)

% Copyright 2007 - 2009 The MathWorks, Inc.