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How to add text to a line in the plot?

222 vues (au cours des 30 derniers jours)
Tomaszzz
Tomaszzz le 26 Avr 2022
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?

Réponse acceptée

Simon Chan
Simon Chan le 26 Avr 2022
If they are horizontal lines, you can use function yline
By using this function, you can also add the text in the following example.

Plus de réponses (1)

Bjorn Gustavsson
Bjorn Gustavsson le 26 Avr 2022
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

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