CODEWITHSUNDEEP
matlab
user990408
user990408

Reputation: 21

Matlab Subplot Axes

I'm having a bit of a problem with what's happening to the axes of 9 plots that get subplotted together. I'm using subplot(3,3,x) to make a 3x3 grid of 9 plots, and custom labeling the ticks of the axes with

set(gca, 'XTickLabel', {'0,0','0,1','0,2','1,0','1,1','1,2','2,0','2,1','2,2'});
set(gca, 'YTickLabel', {'0,0','0,1','0,2','1,0','1,1','1,2','2,0','2,1','2,2'});

and the problem is that not all of the ticks specified show up on the subplots -- only about half of them, and they show up in the wrong places, at that.

I'm guessing this is matlab thinking that there isn't enough room to put all of the ticks and labels and showing a squeezed subset as a result, but it would look fine if it just did it. how do I make it all show up??

Upvotes: 1

Views: 4331

Answers (3)

solimanelefant
solimanelefant

Reputation: 546

You can set the 'Xtick' & 'Ytick' property of the figure's axes. They define which ticks will be visible. In your case you want to show the first 9 xticks and the first 9 yticks - the following command will do it:

set(gca,'Xtick',1:9, 'Ytick',1:9)

In case you want to show every 2nd tick you would use:

set(gca,'Xtick',1:2:9,'Ytick',1:2:9)

Hope this helps.

Upvotes: 4

Gunther Struyf
Gunther Struyf

Reputation: 11168

You set custom tick labels with those commands, and they show up where the ticks are at that moment. You can see what the ticks are with

get(gca,'YTick');

For example:

plot(-2:2)
get(gca,'YTick');

returns [-2 -1.5 -1 -0.5 0 0.5 1 1.5 2]. If you now use

set(gca,'yticklabel',{'a','b','c','d','e'})

then those letters will appear at all ticks, starting from the first (-2) and since there are more ticks than ticklabels, the ticklabels will repeat, as you can see: enter image description here

So these are ticks, but maybe you meant to just use labels, which I add with the following:

ylabel('this is the ylabel');
xlabel('and this the xlabel');

enter image description here

Play around with it and learn what's going, it's not that hard ;)

PS: with subplot, you can create different axes and set different ticks for each axes object separately. By default the axes are not linked or something, but completely independent! When you use gca, it returns the current axes, ie with subplot: the last one created or selected with subplot(3,3,x)!

So if you want to set ticks, labels are anything else on all the axes, you'll have to do it for all separately, ie:

subplot(3,3,1);
  xlabel('x');
  ylabel('y');
  title('subplot (1,1)');
  set(gca,'xticklabel',{'a','b','c'});
subplot(3,3,2);
  xlabel('x');
  ylabel('y');
  title('subplot (1,2)');
subplot(3,3,1);
  xlabel('x');
  ylabel('y');
  title('subplot (1,1)');
etc.

enter image description here

Upvotes: 3

R. Schifini
R. Schifini

Reputation: 9313

It's a matter of space. Matlab will show more ticks if you increase the size of the plot window, and viceversa. You can also reduce the font size in order to fit more ticks on the axes (try with set(gca,'FontSize',5) or any other font size value).

Upvotes: 1

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