How to add text label to plot referenced to the second y-axis

I would like to add a text label to my plotyy figure with the y-coordinate of the text(x,y,'string') referenced to the second y-axis. For example, I would like to have a text label at x=1 and y-axis(1)=3000 (text(1,3000,'string')) and another text label at x=2 and y-axis(2)=500, the second instance should be referenced to the second y-axis not the first.

I have tried,

[ax1,h1,h2]=plotyy(x1,y1,x2,y2);

text(ax1(2),xtext,ytext,'string')

"Error using text"

"First two or three arguments must be numeric doubles."

no luck yet, any suggestions would be appreciated. I do not have R2016 or I would have tried yyaxis left and yyaxis right.

Answer 1

[Mischa Kim]

Mark, what about something like

 x  = 0:0.01:10;
 y1 = exp(-0.05*x).*sin(x);
 y2 = exp(-0.5*x).*sin(10*x);

 [ax, h1, h2] = plotyy(x, y1, x, y2, 'plot');
 text(x(1),  y1(1),'string 1')
 text(x(end),y2(1),'string 2')

[Mark Wilson]

That is exactly what I'm looking for unfortunately it will not work for my application. Here is what I have,

 x  = 0:0.01:10;
 y1 = exp(-0.05*x).*sin(x);
 y2 = exp(-0.5*x).*sin(10*x);
 y3 = exp(-0.25*x).*sin(5*x);

 [ax, h1, h2] = plotyy(x, y1, x, y2, 'scatter');
 hold(ax(2),'on')
h3=scatter(ax(2),x,y3,'marker','d','MarkerEdgeColor','[0 0.5 0]');
hold(ax(2),'on')
h4=plot(ax(2),[0 10],[0.3606 0.3603],'k--');
hold(ax(1),'on')
h5=plot(ax(1),[0 10],[0.3606 0.3603],'b-.');
ylim(ax(2),[-0.75 0.75])
text(x(1),  y1(1),'string 1')
text(x(end),y2(1),'string 2')
 text(4.07,0.3606,'   \leftarrowy2=0.3606') %I would like this to be referenced to the 2nd y-axis
legend([h4(1) h5(1)],{'y2=0.3606','y1=0.3606'},'location','southoutside','orientation','horizontal')