Accelerating MATLAB Performance

550 Accelerating MATLAB

®

Performance

delete(get(hAxes,'Children')); % delete old plot lines

plot(hAxes,xdata,ydata); % display new lines

10.2.2 Plot and Image Update

It is much faster to update an existing graphic object’s properties than to replace it with a

new object. Plot elements (lines, markers, patches, etc.) are a specic example for this gen-

eral advice. For example, instead of replotting the data, it is faster to update an existing plot

line’s data property values (XData, YData, and ZData):

% Prepare the original data

t = 0 : 0.001 : 10; % 10,001 data points

originalYData = sin(t);

% Plot the data

hLine = plot(t,originalYData); ...