plot several X=const

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Maxime
Maxime on 17 Sep 2014
Commented: Image Analyst on 17 Sep 2014
Hello,
I have a vector G (with 120 values).
I'd like to plot a vertical line for each value of this vector in a graph having an other curve. How can I do this?
thank you

Answers (1)

Image Analyst
Image Analyst on 17 Sep 2014
Perhaps the stem() function?
g = rand(1, 10);
plot(g, 'ro-', 'LineWidth', 2);
hold on;
stem(g);
  4 Comments
Image Analyst
Image Analyst on 17 Sep 2014
Edited: Image Analyst on 17 Sep 2014
How about this:
Y = [2.5, 34, 65, -12]
G = [12.5, 5.789, 4.6102, 21.09]
plot(Y, 'ro-', 'LineWidth', 4);
grid on;
hold on;
stem(G, max(Y)*ones(1, length(G)), 'Marker', 'none', 'LineWidth', 4);
Note: Y and G don't have to have the same number of elements. ALso, you have not defined an X for the Y values so I'm just assuming X is the index number. For the "G" lines, I'm having them go just from 0 up to the max Y value since you gave no indication of where the lines start or stop.
Image Analyst
Image Analyst on 17 Sep 2014
Another option to go the full height of the graph is to use line() function:
Y = [2.5, 34, 65, -12]
G = [12.5, 5.789, 4.6102, 21.09]
plot(Y, 'ro-', 'LineWidth', 4);
grid on;
hold on;
yl = ylim();
for k = 1 : length(G)
x = G(k);
line([x, x], yl, 'Marker', 'none', 'LineWidth', 4);
end

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