change interval for xtick label

Consider the following example:

clear all 
x = (0:23).';
n = numel(x);
time = cellstr(datestr([ones(n,1)*[2012 3 10] x zeros(n,2)],'HH:MM'));

Data = rand(1,24);

plot(x,Data);
set(gca,'XTick',0:23);
set(gca,'XTickLabel',time);

Here, I can plot the change in a certain variable as a function of time (in hours). Is there a method for only showing every other hour in the x axis i.e. still show all of the data but with the ticks showing 00:00 02:00 04:00...etc.

I have tried:

set(gca,'XTick',0:2:23);

but to no avail. Any advice would be appreciated.

Answer 1

[Wayne King]

Hi, you have to do the same thing for xticklabel

 set(gca,'Xtick',0:3:23)
 set(gca,'XtickLabel',time(1:3:end))

[Richard]

many thanks.