how do i change color of the y-axes made by plotyy?

I am trying to make the color of the left Y axis red and the color of the right Y axis blue. I can't figure out the right syntax.

Thanks in advance.

A snip of the code I have is below:

    close;
         % plot F23 vs. D in figure gcf       
         [AX,H1,H2]=plotyy(Dcurve,F23curve,W,V,'plot');
         AX
         set(gcf,'Position',[500,500,900,500]); 
         title('Click on all the discontinuities and then hit Return key');
         set(get(AX(1),'Ylabel'),'String','Force^(2/3) [N^(2/3)]');
  % ? %  set(get(AX(1),'color'),'red');
         set(get(AX(2),'Ylabel'),'String','Force [N]');
  % ? %  set(get(AX(2),'color'),'blue');
         xlabel('Indentation depth [m]');
         set(H1,'LineStyle','-');
         set(H1,'color','red');
         set(H2,'LineStyle','-');
         set(H2,'color','blue');

         hold on
         % user double click on all discontinuities and press enter  
         [xm,ym]=ginput;

Answer 1

[Matt Fig]

An example:

x = 0:0.01:20;
y1 = 200*exp(-0.05*x).*sin(x);
y2 = 0.8*exp(-0.5*x).*sin(10*x);
[AX,H1,H2] = plotyy(x,y1,x,y2,'plot');
set(AX,{'ycolor'},{'r';'b'})  % Left color red, right color blue...

[Rory Staunton]

thank you for the quick answer. sometimes all of these different varieties of syntax just get the better of me...

[Matt Fig]

You could also do this, which might be easier to remember:

set(AX(1),'ycolor','r')

set(AX(2),'ycolor','b')

[Karen Henneke]

It sure would be nice if matlab would go back to help as they used to do it 10 or so years ago---one could find what they needed easily---now it is hard to find anything you need in matlab help

[Timothy Reilly]

I agree. Help is getting to be a bubbling swamp like Microsoft help.

Answer 2

[Alejandro]

I'm using this:

% removing ticks and everything else

% for x
set(gca,'XTickLabel',[])
set(gca,'XTick',[])
set(gca,'xcolor','w') 

% for y
set(gca,'YTickLabel',[])
set(gca,'YTick',[])
set(gca,'ycolor','w') 

% for z
set(gca,'ZTickLabel',[])
set(gca,'ZTick',[])
set(gca,'zcolor','w')

seems that it works pretty well, leaving just the with box in the background.

[Linghui Wang]

How about change the right y-axis?

[Dan Weaver]

plt = gca;
plt.YAxis(2).Color = 'k'; % change color of RHS y-axis to black

[Walter Roberson]

Using YAxis(2) will only work for R2014b or later, when yyaxis has been used, and will not work for plotyy()

[Sara Anthony]

I know this is really old, but I wanted to leave a comment that might help someone else. Alejandro's answer works the best for me. However, it's likely because I'm already using that format for the rest of my code:

yyaxis left
errorbar(Wr2IsotDateNum(1:22,1),Wr2D18O(1:22,1),ErrWr2D18O(1:22),'*--k')
ylim([-8.6 -7.5])
ytickformat('%.1f')
set(gca,'ycolor','k')
yyaxis right
plot(W2DateNum(22468:22598,1),M5Wr2C,'b')
set(gca,'ycolor','b')
ylim([0.64 0.7])
ytickformat('%.2f')

[Sharath Nagaraju]

@Sara Anthony Code was really helpful