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Brad
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Is there a way to disconnect lines between data points while utilizing the plot function?

Asked by Brad
on 22 Oct 2013
Latest activity Commented on by Brad
on 22 Oct 2013
Let's say I have the following lines of code;
x = [1;2;3;4;5;6;7;8;6];
y = [10;20;30;40;50;60;70;80;30];
plot(x,y,'-o');
When executed, I get a simple 2D line plot where all 9 of the Y values are plotted and connected by a solid line.
Is there a way to disconnect the line between the 8th and 9th data point while maintaining it for the first 8?

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2 Answers

Answer by sixwwwwww
on 22 Oct 2013
Edited by sixwwwwww
on 22 Oct 2013
 Accepted Answer

Dear Brad, you can do it the following way:
x = [1;2;3;4;5;6;7;8;9];
y = [10;20;30;40;50;60;70;80;90];
plot(x(1:end - 1),y(1:end - 1),'-o'); hold on
plot(x(end), y(end), 'o')
xlim([x(1) x(end)+x(1)]), ylim([y(1) y(end)+y(1)])
I hope it helps. Good luck!

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Good call. I forgot all about using hold on!!

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Answer by Matt Kindig on 22 Oct 2013

Another way is to insert a NaN between the dis-connected points, such as:
x = [1;2;3;4;5;6;7;8;6];
y = [10;20;30;40;50;60;70;80;30];
x = [ x(1:8), NaN, x(9:end)];
y = [ y(1:8), NaN, y(9:end)];
plot(x,y,'-o');
Matlab won't plot a NaN, so the effect is to break up your lines.

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