write indexes in a plot

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Luis Isaac
Luis Isaac le 21 Fév 2020
Dear
I have a matrix P with n rows and two columns, each of the column store the x and y position of a particle.
Represent the particle postions is easy (plot(P(:,1),P:,2)), I would like to write the index of each particle just beside each point
How can I do it?
Many thanks!!

Réponse acceptée

Giuseppe Inghilterra
Giuseppe Inghilterra le 21 Fév 2020
Hi,
Example code taken from above answer:
x = 1:10; y = 1:10; scatter(x,y);
a = [1:10]'; b = num2str(a); c = cellstr(b);
dx = 0.1; dy = 0.1; % displacement so the text does not overlay the data points
text(x+dx, y+dy, c);
This should resolve your problem.
  2 commentaires
Luis Isaac
Luis Isaac le 21 Fév 2020
yes, this is what I am looking for
But a final question, Is there any way to control the size of the numerical labels of each point?
Giuseppe Inghilterra
Giuseppe Inghilterra le 21 Fév 2020
You can specify fontsize property as follow:
text(x+dx, y+dy, c,'FontSize',k);
with k as scalar value equal to your desired fontsize.

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