Modifying second axes properties in plotyy

Hi,

I've created a gui, and one of the "axes" is derived from a plotyy graph.

I would like to add labels to all of the axes. I can label the X axis and the Y axis on the left. I am having trouble adjusting any properties of the right hand side Y axis.

I can call [AX,H1,H2] = plotyy(etc) and I get AX giving the handle of my axes. However, if I use AX(2), I get an error about it not being a handle. There were a couple of other things which I tried (but rather embarrassingly, I can't remember them!).

If anyone has any suggestions, they'd be much appreciated!

Many thanks!

Answer 1

[Sean de Wolski]

[ax h1 h2] = plotyy(1:10,'r',10:-1:1,'b')
ax(2)

works for me... Please post a full example that demonstrates the behavior you are seeing.

MORE per Comments

x1 = 1:10;
x2 = x1;
y1 = 1:10;
y2 = 10:-1:1;

[AX, ~, ~] = plotyy(x1, y1, x2, y2, 'semilogx');

set(gca, 'yminorgrid', 'on') 
set(gca, 'yminortick','on') 
ylabel('Yaxis')
set(get(AX(2),'ylabel'), 'string', 'Secondlabel')

If you look at:

get(AX(2))

'ylabel' is a handle to a text object. That is why you are seeing that error message. You need to set the string of the object corresponding to that handle (this is what I did above).

Of course, for this application, you could just call ylabel() with the axes_handle:

ylabel(AX(2),'hello world')

[J]

Hi Sean,

Thanks for your reply.

So I call [AX, ~, ~] = plotyy(x1, y1, x2, y2, 'semilogx') and then I set the left hand variables as follows:

set(gca, 'yminorgrid', 'on')

set(gca, 'yminortick','on')

ylabel('Yaxis')

then if I try to do set(AX(2), 'ylabel', 'Secondlabel'). The error message is: Error using set

Value must be a handle but just before then, the window prints that AX =

10.0155 12.0156

Many thanks!

[Aditya]

Hi J,

As Sean mentioned use set(get(AX(2),'ylabel'), 'string', 'Secondlabel')

and not set(AX(2), 'ylabel', 'Secondlabel')