How do I can do a discontinuous curve in matlab?

I'm trying to plot a time serie with depth in the 'y' axis and concentration of certain elements in de 'x' axis. However in my data I have depths where there are no values of concentration (but that doesn't mean a zero concentration). I want a curve that shows the portions where there are values of concentration, but also the portions where there are not.

I have my data in a .dat file. At the moment of running the script an error tells me that the number of file must be the same :(

How can I say to matlab that I dont want curve in the portions where there are no values, and I want it where there are, and that I want to see it in a same ploT?

(Sorry for my english :( )

Answer 1

[Walter Roberson]

Replace the missing values with NaN and nothing will be plotted there.

Answer 2

[Image Analyst]

Make one of the x be a NaN - that way it won't plot and there will not be any connecting lines. For example

% First section
x1 = linspace(0, 2*pi, 100);
y = cos(x1);
% Second Section.
x2 = linspace(2*pi, 4*pi, 100);
% Make first element of x2 be a nan
x2(1)=nan;
y = [y, sin(x2)];
plot([x1, x2], y, 'b-', 'LineWidth', 3);
grid on;

Answer 3

[Raúl Silva]

Ohh, thanks so much to both. You've saved my life (I have a meeting with my thesis adviser tomorrow)