Help with labelling the axes of a plot.

I have a simple plot of data measured once a month over 4 years. My code looks like this:

t=1:1:48
ydata=[48 different values]
plot(t,ydata)

I'm still very much a novice with MATLAB, & while I know to add a label to the x-axis, what I would like to do with this plot on the x-axis, is split it into sections of 12 numbers to clearly show the results of each year on the plot. So that there would be one seperate section for t=1:12, and another for t=13:24, etc. Any help with this would be much appreciated, thank you very much.

[Walter Roberson]

Do you want to create two separate plots? If not then how would you like to mark the two different sections?

[Connor Marvell]

My apologies, I wasn't clear. I'd like just one plot, but I'd like each 12 values on the x-axis to be highlighted differently somehow, just to show clearly that they are representing different years.

Answer 1

[dpb]

Something like

 hL=plot(reshape(t,12,[]),reshape(y,12,[]));

is really easy to get the effect by ML's treating each column on an array as a separate variable. The one thing might not care for w/o some fixup is this leaves a break between the line segments...so, another way would be

 plot(t,y,'k-')      % draw solid line first
 hold on
 hL=plot(reshape(t,12,[]),reshape(y,12,[]),'*-');  % then add colored markers

Add legends to label color, change symbols, etc., to "salt to suit!"...

[Connor Marvell]

This is perfect thank you, exactly what I was after. Thanks a lot for this!