Section: Handle-Based Graphics
hold(state)
where state is either
hold('on')
to turn hold on, or
hold('off')
to turn hold off. If you specify no argument then
hold toggles the state of the hold:
hold
You can also specify a particular axis to the hold command
hold(handle,...)
where handle is the handle for a particular axis.
hold function allows one to construct a plot sequence
incrementally, instead of issuing all of the plots simultaneously
using the plot command.
hold command and the
multiple-argument plot command to construct a plot composed
of three sets of data. The first is a plot of a modulated Gaussian.
--> x = linspace(-5,5,500); --> t = exp(-x.^2); --> y = t.*cos(2*pi*x*3); --> plot(x,y);
We now turn the hold state to 'on', and add another plot
sequence, this time composed of the top and bottom envelopes of
the modulated Gaussian. We add the two envelopes simultaneously
using a single plot command. The fact that hold is
'on' means that these two envelopes are added to (instead of
replace) the current contents of the plot.
--> plot(x,y); --> hold on --> plot(x,t,'g-',x,-t,'b-')