How to add text to a line in the plot?

Hi all,

This code:

load('z_means'); load ('z_diffs'); load ('z_CR_ofmean')
figure ('color','w');    
plot(z_means,z_diffs,'sr', 'MarkerSize', 9)
hold on
%Plot lines
plot(z_means,zeros(1,length(z_means)),'r', 'LineWidth', 0.7); %%%plot zero 
plot(z_means, ones(1,length(z_means)).*z_CR_ofmean(1),'r--', 'LineWidth', 0.6); %%%plot the upper CR
plot(z_means, ones(1,length(z_means)).*z_CR_ofmean(2),'r--', 'LineWidth', 0.6); %%%plot the lower CR
% Add text 
text(z_CR_ofmean, [mynum2str(z_CR_ofmean(1)) ''],'HorizontalAlignment','left','VerticalAlignment','middle','fontsize',6);
text(z_means, [mynum2str(z_means,2) ''],'HorizontalAlignment','left','VerticalAlignment','middle','fontsize',6);
text(z_CR_ofmean, [mynum2str(z_CR_ofmean(2))''],'HorizontalAlignment','left','VerticalAlignment','middle','fontsize',6);

Produces this:

and the error:

Error using text
First two or three arguments must be numeric doubles.

Wheareas I want:

1. Add text to each line correctly (can be any text as an example). Can you help please?

Answer 1

[Simon Chan]

If they are horizontal lines, you can use function yline

By using this function, you can also add the text in the following example.

Answer 2

[Bjorn Gustavsson]

With text you specify both the x and y-coordinate of the text. For example:

th = text(14,-0.5,'text-test that will start at x: 14, y: -0.5');

So you just need to specify an/the x-location before the specification of the y-location (z_CR_ofmean).

HTH